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What are the best to-do apps for developers?

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Todo.txt vs Trello vs Org mode

 vs Todoist vs Taskwarrior vs Zenkit vs Wekan vs Kanboard vs SquidHub vs Super Productivity vs Hitask vs Checkvist vs Moo.do vs OmniFocus 2 vs Things vs imdone-atom vs devtodo vs devtodo2 vs Timpler vs Notezilla sticky notes

Specs

Platforms

Android / iOS / CLI

Collaborative

no

API

no

Source model

Open source

Dark Theme

-

Subtasks

-

Offline access

-

Reminders

-

Mobile widget

-

Markdown support

-

Location-based reminders

-

Multifactor

-

Local hosting

-

Slack Integration

-

HipChat Integration

-

GitHub Integration

-

Karma system

-

Search

-

Supported Calendars

-

Open Source

-

Languages

-

Multiple Accounts

-

Swimlanes

-

Technology

-

Cross Platform

-

Storage types

-

Realtime

-

Recurring

-

Free Trial

-

Weekly Reports

-

Daily Reports

-

Incoming email support

-

Markdown

-

Web Clipper

-

Location based reminders

-

Storage

-

Real-time collaboration

-

Cross-linking

-

iPhone price

-

Mac price

-

iPad price

-

Platforms

Android / iOS / Windows / Web

Collaborative

Yes

API

Yes

Source model

-

Dark Theme

Yes

Subtasks

Yes

Offline access

yes

Reminders

yes

Mobile widget

Yes

Markdown support

Yes

Location-based reminders

No

Multifactor

Yes

Local hosting

No

Slack Integration

Yes

HipChat Integration

Yes (addon)

GitHub Integration

Yes

Karma system

-

Search

-

Supported Calendars

-

Open Source

-

Languages

-

Multiple Accounts

-

Swimlanes

-

Technology

-

Cross Platform

-

Storage types

-

Realtime

-

Recurring

-

Free Trial

-

Weekly Reports

-

Daily Reports

-

Incoming email support

-

Markdown

-

Web Clipper

-

Location based reminders

-

Storage

-

Real-time collaboration

-

Cross-linking

-

iPhone price

-

Mac price

-

iPad price

-

Platforms

-

Collaborative

-

API

-

Source model

-

Dark Theme

-

Subtasks

-

Offline access

-

Reminders

-

Mobile widget

-

Markdown support

-

Location-based reminders

-

Multifactor

-

Local hosting

-

Slack Integration

-

HipChat Integration

-

GitHub Integration

-

Karma system

-

Search

-

Supported Calendars

-

Open Source

-

Languages

-

Multiple Accounts

-

Swimlanes

-

Technology

-

Cross Platform

-

Storage types

-

Realtime

-

Recurring

-

Free Trial

-

Weekly Reports

-

Daily Reports

-

Incoming email support

-

Markdown

-

Web Clipper

-

Location based reminders

-

Storage

-

Real-time collaboration

-

Cross-linking

-

iPhone price

-

Mac price

-

iPad price

-

Platforms

Android / iOS / OSX / Windows / Web / Gmail / Outlook / Thunderbird / Kindle / Chrome / Firefox

Collaborative

-

API

-

Source model

-

Dark Theme

-

Subtasks

-

Offline access

-

Reminders

yes

Mobile widget

yes

Markdown support

-

Location-based reminders

yes

Multifactor

No

Local hosting

-

Slack Integration

-

HipChat Integration

-

GitHub Integration

-

Karma system

yes

Search

-

Supported Calendars

-

Open Source

-

Languages

-

Multiple Accounts

-

Swimlanes

-

Technology

-

Cross Platform

-

Storage types

-

Realtime

-

Recurring

-

Free Trial

-

Weekly Reports

-

Daily Reports

-

Incoming email support

-

Markdown

-

Web Clipper

-

Location based reminders

-

Storage

-

Real-time collaboration

-

Cross-linking

-

iPhone price

-

Mac price

-

iPad price

-

Platforms

Linux / OSX / Windows(Cygwin)

Collaborative

no

API

no

Source model

-

Dark Theme

yes

Subtasks

yes

Offline access

yes

Reminders

-

Mobile widget

-

Markdown support

-

Location-based reminders

-

Multifactor

-

Local hosting

-

Slack Integration

-

HipChat Integration

-

GitHub Integration

-

Karma system

-

Search

yes

Supported Calendars

-

Open Source

-

Languages

-

Multiple Accounts

-

Swimlanes

-

Technology

-

Cross Platform

-

Storage types

-

Realtime

-

Recurring

-

Free Trial

-

Weekly Reports

-

Daily Reports

-

Incoming email support

-

Markdown

-

Web Clipper

-

Location based reminders

-

Storage

-

Real-time collaboration

-

Cross-linking

-

iPhone price

-

Mac price

-

iPad price

-

Platforms

Web, Windows, macOS, Linux, Android, iPhone

Collaborative

Yes

API

Yes

Source model

-

Dark Theme

Yes

Subtasks

-

Offline access

Yes

Reminders

Yes

Mobile widget

-

Markdown support

Yes

Location-based reminders

-

Multifactor

-

Local hosting

-

Slack Integration

-

HipChat Integration

-

GitHub Integration

-

Karma system

-

Search

Yes

Supported Calendars

Google Calendar - Outlook & Apple coming soon

Open Source

Only as Linux Snap

Languages

English, German, Portuguese, Spanish, French, Chinese (traditional), Korean, Russian

Multiple Accounts

Yes

Swimlanes

Yes

Technology

-

Cross Platform

-

Storage types

-

Realtime

-

Recurring

-

Free Trial

-

Weekly Reports

-

Daily Reports

-

Incoming email support

-

Markdown

-

Web Clipper

-

Location based reminders

-

Storage

-

Real-time collaboration

-

Cross-linking

-

iPhone price

-

Mac price

-

iPad price

-

Platforms

Linux, Docker

Collaborative

-

API

-

Source model

-

Dark Theme

-

Subtasks

-

Offline access

-

Reminders

-

Mobile widget

-

Markdown support

-

Location-based reminders

-

Multifactor

-

Local hosting

-

Slack Integration

-

HipChat Integration

-

GitHub Integration

-

Karma system

-

Search

-

Supported Calendars

-

Open Source

-

Languages

-

Multiple Accounts

-

Swimlanes

-

Technology

Node.js, MongoDB

Cross Platform

-

Storage types

-

Realtime

-

Recurring

-

Free Trial

-

Weekly Reports

-

Daily Reports

-

Incoming email support

-

Markdown

-

Web Clipper

-

Location based reminders

-

Storage

-

Real-time collaboration

-

Cross-linking

-

iPhone price

-

Mac price

-

iPad price

-

Platforms

Windows, Linux

Collaborative

-

API

-

Source model

-

Dark Theme

-

Subtasks

-

Offline access

-

Reminders

-

Mobile widget

-

Markdown support

-

Location-based reminders

-

Multifactor

-

Local hosting

-

Slack Integration

-

HipChat Integration

-

GitHub Integration

-

Karma system

-

Search

-

Supported Calendars

-

Open Source

-

Languages

-

Multiple Accounts

-

Swimlanes

-

Technology

PHP

Cross Platform

-

Storage types

-

Realtime

-

Recurring

-

Free Trial

-

Weekly Reports

-

Daily Reports

-

Incoming email support

-

Markdown

-

Web Clipper

-

Location based reminders

-

Storage

-

Real-time collaboration

-

Cross-linking

-

iPhone price

-

Mac price

-

iPad price

-

Platforms

Web / iOS / Android

Collaborative

Yes

API

-

Source model

-

Dark Theme

-

Subtasks

Yes

Offline access

-

Reminders

Yes

Mobile widget

-

Markdown support

-

Location-based reminders

No

Multifactor

-

Local hosting

-

Slack Integration

-

HipChat Integration

-

GitHub Integration

-

Karma system

-

Search

Yes

Supported Calendars

Google Calendar integration

Open Source

-

Languages

-

Multiple Accounts

-

Swimlanes

-

Technology

-

Cross Platform

Yes

Storage types

Google Drive integration + upload directly to SquidHub + link to documents on other platforms

Realtime

Yes

Recurring

Yes

Free Trial

-

Weekly Reports

-

Daily Reports

-

Incoming email support

-

Markdown

-

Web Clipper

-

Location based reminders

-

Storage

-

Real-time collaboration

-

Cross-linking

-

iPhone price

-

Mac price

-

iPad price

-

Platforms

Windows, Linux, Mac, Web

Collaborative

-

API

-

Source model

-

Dark Theme

-

Subtasks

-

Offline access

-

Reminders

-

Mobile widget

-

Markdown support

-

Location-based reminders

-

Multifactor

-

Local hosting

-

Slack Integration

-

HipChat Integration

-

GitHub Integration

-

Karma system

-

Search

-

Supported Calendars

-

Open Source

-

Languages

-

Multiple Accounts

-

Swimlanes

-

Technology

Typescript

Cross Platform

-

Storage types

-

Realtime

-

Recurring

-

Free Trial

-

Weekly Reports

-

Daily Reports

-

Incoming email support

-

Markdown

-

Web Clipper

-

Location based reminders

-

Storage

-

Real-time collaboration

-

Cross-linking

-

iPhone price

-

Mac price

-

iPad price

-

Platforms

Web, iOS, Android

Collaborative

Yes

API

Yes

Source model

-

Dark Theme

Yes

Subtasks

Yes

Offline access

Yes

Reminders

Yes

Mobile widget

-

Markdown support

-

Location-based reminders

-

Multifactor

-

Local hosting

No

Slack Integration

-

HipChat Integration

-

GitHub Integration

-

Karma system

-

Search

-

Supported Calendars

-

Open Source

No

Languages

-

Multiple Accounts

-

Swimlanes

-

Technology

-

Cross Platform

-

Storage types

-

Realtime

-

Recurring

-

Free Trial

Yes

Weekly Reports

Yes

Daily Reports

Yes

Incoming email support

-

Markdown

-

Web Clipper

-

Location based reminders

-

Storage

-

Real-time collaboration

-

Cross-linking

-

iPhone price

-

Mac price

-

iPad price

-

Platforms

Web-based, Android/iOS PWA

Collaborative

yes

API

yes

Source model

-

Dark Theme

yes

Subtasks

yes

Offline access

-

Reminders

-

Mobile widget

yes

Markdown support

-

Location-based reminders

-

Multifactor

-

Local hosting

-

Slack Integration

-

HipChat Integration

-

GitHub Integration

-

Karma system

no

Search

-

Supported Calendars

-

Open Source

-

Languages

-

Multiple Accounts

-

Swimlanes

-

Technology

-

Cross Platform

-

Storage types

-

Realtime

-

Recurring

-

Free Trial

-

Weekly Reports

-

Daily Reports

-

Incoming email support

yes

Markdown

yes

Web Clipper

yes

Location based reminders

-

Storage

-

Real-time collaboration

-

Cross-linking

-

iPhone price

-

Mac price

-

iPad price

-

Platforms

Web, Windows, Mac, Android, iOS

Collaborative

yes

API

-

Source model

-

Dark Theme

yes

Subtasks

yes

Offline access

yes

Reminders

-

Mobile widget

no

Markdown support

-

Location-based reminders

-

Multifactor

-

Local hosting

-

Slack Integration

-

HipChat Integration

-

GitHub Integration

-

Karma system

no

Search

-

Supported Calendars

-

Open Source

-

Languages

-

Multiple Accounts

-

Swimlanes

-

Technology

-

Cross Platform

-

Storage types

-

Realtime

-

Recurring

-

Free Trial

-

Weekly Reports

-

Daily Reports

-

Incoming email support

-

Markdown

-

Web Clipper

-

Location based reminders

no

Storage

Moo.do (free, encrypted), Google Drive (paid, not encrypted)

Real-time collaboration

yes

Cross-linking

yes

iPhone price

-

Mac price

-

iPad price

-

Platforms

-

Collaborative

No

API

No

Source model

-

Dark Theme

Yes

Subtasks

Yes

Offline access

Yes

Reminders

-

Mobile widget

-

Markdown support

No

Location-based reminders

-

Multifactor

-

Local hosting

-

Slack Integration

-

HipChat Integration

-

GitHub Integration

-

Karma system

No

Search

-

Supported Calendars

-

Open Source

-

Languages

-

Multiple Accounts

-

Swimlanes

-

Technology

-

Cross Platform

-

Storage types

-

Realtime

-

Recurring

-

Free Trial

-

Weekly Reports

-

Daily Reports

-

Incoming email support

-

Markdown

-

Web Clipper

-

Location based reminders

Yes

Storage

-

Real-time collaboration

-

Cross-linking

-

iPhone price

-

Mac price

-

iPad price

-

Platforms

Mac, iPad, iPhone, Apple Watch

Collaborative

-

API

-

Source model

-

Dark Theme

-

Subtasks

-

Offline access

-

Reminders

-

Mobile widget

-

Markdown support

-

Location-based reminders

-

Multifactor

-

Local hosting

-

Slack Integration

-

HipChat Integration

-

GitHub Integration

-

Karma system

-

Search

-

Supported Calendars

-

Open Source

-

Languages

-

Multiple Accounts

-

Swimlanes

-

Technology

-

Cross Platform

-

Storage types

-

Realtime

-

Recurring

-

Free Trial

-

Weekly Reports

-

Daily Reports

-

Incoming email support

-

Markdown

-

Web Clipper

-

Location based reminders

-

Storage

-

Real-time collaboration

-

Cross-linking

-

iPhone price

$9.99

Mac price

$49.99

iPad price

$19.99

Platforms

-

Collaborative

-

API

-

Source model

-

Dark Theme

-

Subtasks

-

Offline access

-

Reminders

-

Mobile widget

-

Markdown support

-

Location-based reminders

-

Multifactor

-

Local hosting

-

Slack Integration

-

HipChat Integration

-

GitHub Integration

-

Karma system

-

Search

-

Supported Calendars

-

Open Source

-

Languages

-

Multiple Accounts

-

Swimlanes

-

Technology

-

Cross Platform

-

Storage types

-

Realtime

-

Recurring

-

Free Trial

-

Weekly Reports

-

Daily Reports

-

Incoming email support

-

Markdown

-

Web Clipper

-

Location based reminders

-

Storage

-

Real-time collaboration

-

Cross-linking

-

iPhone price

-

Mac price

-

iPad price

-

Platforms

-

Collaborative

-

API

-

Source model

-

Dark Theme

-

Subtasks

-

Offline access

-

Reminders

-

Mobile widget

-

Markdown support

-

Location-based reminders

-

Multifactor

-

Local hosting

-

Slack Integration

-

HipChat Integration

-

GitHub Integration

-

Karma system

-

Search

-

Supported Calendars

-

Open Source

-

Languages

-

Multiple Accounts

-

Swimlanes

-

Technology

-

Cross Platform

-

Storage types

-

Realtime

-

Recurring

-

Free Trial

-

Weekly Reports

-

Daily Reports

-

Incoming email support

-

Markdown

-

Web Clipper

-

Location based reminders

-

Storage

-

Real-time collaboration

-

Cross-linking

-

iPhone price

-

Mac price

-

iPad price

-

Platforms

-

Collaborative

-

API

-

Source model

-

Dark Theme

-

Subtasks

-

Offline access

-

Reminders

-

Mobile widget

-

Markdown support

-

Location-based reminders

-

Multifactor

-

Local hosting

-

Slack Integration

-

HipChat Integration

-

GitHub Integration

-

Karma system

-

Search

-

Supported Calendars

-

Open Source

-

Languages

-

Multiple Accounts

-

Swimlanes

-

Technology

-

Cross Platform

-

Storage types

-

Realtime

-

Recurring

-

Free Trial

-

Weekly Reports

-

Daily Reports

-

Incoming email support

-

Markdown

-

Web Clipper

-

Location based reminders

-

Storage

-

Real-time collaboration

-

Cross-linking

-

iPhone price

-

Mac price

-

iPad price

-

Platforms

iOS

Collaborative

-

API

-

Source model

-

Dark Theme

-

Subtasks

-

Offline access

-

Reminders

-

Mobile widget

-

Markdown support

-

Location-based reminders

-

Multifactor

-

Local hosting

-

Slack Integration

-

HipChat Integration

-

GitHub Integration

-

Karma system

-

Search

-

Supported Calendars

-

Open Source

-

Languages

-

Multiple Accounts

-

Swimlanes

-

Technology

-

Cross Platform

-

Storage types

-

Realtime

-

Recurring

-

Free Trial

-

Weekly Reports

-

Daily Reports

-

Incoming email support

-

Markdown

-

Web Clipper

-

Location based reminders

-

Storage

-

Real-time collaboration

-

Cross-linking

-

iPhone price

-

Mac price

-

iPad price

-

Platforms

-

Collaborative

-

API

-

Source model

-

Dark Theme

-

Subtasks

-

Offline access

-

Reminders

-

Mobile widget

-

Markdown support

-

Location-based reminders

-

Multifactor

-

Local hosting

-

Slack Integration

-

HipChat Integration

-

GitHub Integration

-

Karma system

-

Search

-

Supported Calendars

-

Open Source

-

Languages

-

Multiple Accounts

-

Swimlanes

-

Technology

-

Cross Platform

-

Storage types

-

Realtime

-

Recurring

-

Free Trial

-

Weekly Reports

-

Daily Reports

-

Incoming email support

-

Markdown

-

Web Clipper

-

Location based reminders

-

Storage

-

Real-time collaboration

-

Cross-linking

-

iPhone price

-

Mac price

-

iPad price

-

Pros + Cons

Pro
 Editable from any text editor without needing any proprietary software

Because todo.txt is just a todo standard with various compatible apps to edit it, you can update it from any device as long as it can edit text and you can access your todo.txt file It's convenient to be able to access your todo list quickly via your programming environment so you don't have to switch contexts, and to have a separate todo.txt file per project.
Comment

Pro
 Works with lots of apps for every platform

Todo.txt lists can be edited in virtually every text editor ever made and accessed on devices that support Dropbox. The user community has also created a number of apps for dozens of platforms.
Comment

Pro
 Command line support

You can edit your lists using the command line (e.g., Terminal) via a supplied bash script.
Comment

Pro
 Comes with a good cli tool

Editing tasks can be done without leaving the command line.
Comment

Pro
 It's free

It runs on MacOS, Android, and Python (in the Mac's Unix CLI) -- all for free.
Comment

Pro
 Full control over your to-dos

You have full access to the underlying programming rules, and therefore total control over your task lists.
Comment

Pro
 Easily editable format

Todo.txt can be edited in plain text and then displayed with neat styles.
Comment

Con
 Android app not updated since 2013

The app only seems to support Dropbox. It would be nice to see support for different and newer file storage services.
Comment

Con
 No support for reoccurring tasks

Tasks have dates corresponding to creation and completion, but there is no explicit support for due dates or for tasks that reoccur.
Comment

Pro
 Easy to sync up between lots of devices and interfaces

At a bare minimum you just need to be able to edit text, but there are many apps and advanced interfaces you can install on many devices to supplement your to-do list editing.
Comment

Con
 Nested tasks not supported

Many todo tasks for developers end up having sub tasks that need to be performed for a parent task to be completed, but the todo.txt format does not have any nesting.
Comment

Pro
 Works well for visual thinkers

The UI is based around Kanban, so you can see all your tasks and their status clearly.
Comment

Pro
 Very customizable workflow

Per project swim/status lanes can be customized to any granularity of progression desired. And in-card checklists make the details of tasks easy to keep track of.
Comment

Con
 Closed source software

The service uses closed source software. And it is impossible to implement a self-hosted solution.
Comment

Pro
 Free for unlimited users

Trello offers a very generous free version that has no ads, no restrictions on the number of users, and very little restriction on how the program can be used. The paid features are generally cosmetic, such as the ability to change the background, add stickers or integration with other tools.
Comment

Pro
 Good visualization of projects

Comment

Pro
 Multiple checklists per task

Each task can have multiple checklists. Checklists can be copied from other tasks.
Comment

Pro
 "Power-ups" allow for third-party service integration

Google Drive, Dropbox, Salesforce, Slack and much more can be integrated into the workflow.
Comment

Pro
 Attach files to cards

Keep all of your files (images, documents, etc.) organized on their relevant cards.
Comment

Pro
 Simple and easy to use interface

There are two primary columns: the board is shown on the left and all the other controls on the right. The main means of interaction is dragging and dropping to-do cards into the various lists. The board structure is very customizable, and includes a variety of features that help along the way: color-coding, due dates, card images, checklists with a graphics bar that allows following progress easily, and card aging for cards that haven’t been touched in a long time.
Comment

Pro
 Cross-platform and cross-sync

Trello works on all modern devices through the web application and has native apps for iOS, Android and Windows 8/10 devices.
Comment

Pro
 Sub-tasks

Each card can have one or even multiple task lists, but only up to 5 levels of sub tasks and 4 levels of projects.
Comment

Pro
 Features to add voting on cards

Trello offers support for features to add voting on cards, often referred to as 'power-ups'.
Comment

Con
 No task hierarchy

Task hierarchy is a paid feature. And complicates the management of big tasks that are composed by bigger tasks.
Comment

Con
 Double pay for some "power-ups"

You should pay "trello" for adding more than one power-up to a board. And also to the company providing the power-up.
Comment

Pro
 Great prioritization, Due date and Story point features

Can set different priorities to various tasks, set appropriate due dates and Story points - timing allotted to each task.
Comment

Pro
 Markdown support with well-rendered images

Trello supports Markdown, meaning that HTML input is represented appropriately. Cards with attachments are also rendered well. For example, images are shown correctly on the card, bug links are detected etc.
Comment

Con
 Managing large projects may be difficult

Trello works best with medium to small projects and with very high-level overviews. It is less effective for projects that require very granular management due to the fact that it becomes considerably more difficult to keep track of various cards and priorities as they are pushed off the screen.
Comment

Con
 Can't create dependencies between cards

Comment

Pro
 Excellent for groups using agile software development

The responsiveness and layers of customization make it easy for team members of various disciplines to collaborate on the same task board.
Comment

Pro
 Highly flexible workflow

Trello calls items used in the workflow “cards.” Cards are double-sided and can contain subtasks as well as notes and other details. Card columns can be used to simulate a workflow by moving cards from left to right as they are completed, or as a way of indicating task priority. The workflow is highly flexible as the columns are completely customizable to suit the task flow. For example, tasks can be put through a workflow "idea > approved > in-progress > pending review > released" or simply "ideas > released" depending on the granularity level needed. This makes Trello a great solution to feature management as it's possible to set up boards to handle everything from agile sprints to a more generic to-do list, all with status management.
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Pro
 Great real-time team collaboration features

Trello has permissions at the board level as well as the ability to assign multiple people to each card. There are a lot of sharing options available and boards can be made visible for the public. It's also possible to subscribe to a card to be notified of its progress. The simplicity of the UI makes collaboration easy because it’s very simple to see the progress of each card and who is responsible for it. It also updates constantly to reflect real-time changes in progress. The simplicity of the UI makes collaboration easy as it’s very simple to see the progress of each card and who is responsible for it. It also reflect changes on boards in real-time.
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Con
 Subtasks lack features

Every task can have a list of subtasks which more closely resembles a standard to-do list. These lack the functions that cards offer you. You cannot comment on a sub-list, give the sub-tasks due dates, or provide additional information. You are limited to only checking them off once completed.
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Con
 Can't get one view of cards across all boards

However, you can view all cards assigned to you.
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Pro
 Many keyboard shortcuts

There are shortcuts for moving carts to other lists, assigning them, adding labels, showing only the ones assigned to the user, and many more.
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 Able to scale much more beyond a todo app

People successfully use it for daily planning, journal, taking notes, and much more. Here's a list of things you can do with it.
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 Versioning can be tracked and synced using Git or other VCS

Org files are plain text, and lend themselves well to version control. Emacs also has good integrations for various VCS.
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 Very flexible

Org-mode is characterized by a flexible and versatile system with adaptability to different workflows, making it comparable as an Evernote alternative. It is at once simple and complex., which helps it to compete as an Evernote alternative.
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 Out-of-the-box Latex support

Org-mode has out-of-the-box support for Latex: it can immediately parse equations (or other Latex markup) and can even compile notes to PDF or HTML.
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 iOS and Android apps which work with Org mode files

On iOS beorg gives you access to all your org mode files on the move - including quick access to your agenda and powerful templates and searching. I'm not an Android user but have heard good things about Orgzly.
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 Text blocks folding (if the editor supports it)

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Con
 Need to learn Emacs

To get the most out of it you need to learn the Emacs text editor.
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 Built-in agenda

Org-mode has some built-in agenda functionality. You can schedule tasks and assign various degrees of importance to each of them. Org-mode agenda can also be synced with Google Calendar.
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 Basic spreadsheet functionality

Org-mode has some basic spreadsheet functionality. Other than auto-formatting ASCII tables (a notoriously annoying problem), it also has support for LISP-like syntax to define equations or any other functionality that can be achieved through spreadsheets.
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Con
 Best if you don't need shared lists

If you need to have to-do lists shared with a large team of people then you'll need to look elsewhere. You can however integrate Org mode with Trello, Jira, etc so it can still be part of an individuals workflow.
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Pro
 Great sync support

Notes and to-dos can be synced with Trello, Toodledo, Simplenote, Orgmobile, or with tools like Git on Github, Dropbox, Google Drive, and Bitbucket, while WebDAV (with iOS and Android) can also be exported to PDF, mind map, LaTeX, HTML, Docbook, or txt.
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Con
 No mobile app

You need a desktop or laptop.
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 Great integration across different platforms

Todoist runs on (at least) Windows, Outlook, Webbrowser, Android, iOS and synchronizes perfectly.
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 Simple UI makes it easy to get things done

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Con
 Limited hierarchy

Only 4 levels of projects and 5 levels of sub tasks.
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 Chrome plugin facilitates triaging GMail and URLs

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Con
 Notifications only in premium version

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Pro
 Presence of due dates, recurrences, and postponing

You can effectively hide task by specifying wait time. Recurrent "prototype" tasks will spawn multiple instances that can be managed kinda independently.
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Pro
 Dependency between tasks and priorities

You can add pre-requisites for task and priorities. Based on that and some other things (labels/projects/due dates/started/etc) it also calculates urgency.
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 Lightweight and fast

Taskwarrior is written in the speedy C++ language.
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 Self-hosted Taskserver

You can be in full control of your data.
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 Customizability

Taskworrior allows you to define custom attributes and reports to your needs.
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 Command line interface

The command line interface puts powerful filtering expressions, context, annotations, tags, due dates, reocurrence, and user-defined-attributes totally in your hands. It’s fast and low friction.
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 Sync across devices

When used in conjunction with the Taskserver, it can sync tasks (conflict-free) across your Taskwarrior devices. This includes integration with Mirakel.
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 Extensible

Taskwarrior has many front-ends, services, extensions, hook scripts, and capsules available. Taskwarrior keeps a list of contributed tools on their site.
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 Native apps

Native apps for iOS, Android, macOS, Windows, and Linux.
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 Free and open source

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 Self hosting possible

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 Free/Libre (MIT)

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 Full keyboard support

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 Jira integration

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 Mobile support

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 In browser or as desktop app

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 Github integration

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 Pomodoro timer

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 Customizable themes

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 Free & open source

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 Scalability

Doesn't matter in a daily capacity as the software is so user friendly but can be cumbersome when making additions/changes.
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 Mobile apps

Both mobile apps are great and minimal, which helps in getting daily developer tasks done. Agile developers like the ease of use.
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 Generous set of free features

Checkvist offers many free features if you are using this individually.
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Pro
 Converts incoming emails to todos - this is a way to enter tasks from anywhere.

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 Tasks can be managed with custom tags

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 Markdown and code-snippets

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 Great search

Search filters help you search for tasks by tag, due date, assignee, etc.
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 vim-like commands

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 Very flexible

To-do lists often need to be grouped and regrouped for clarity. The outline-based nature of Checkvist makes it easy to move things across categories, to increase and decrease priority, etc.
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 Images and links can now be added to any party of the outline

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 Actively being developed

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 No limit on list items in the free version

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 Ability to zoom in/focus on a branch

Quite unique feature, missing in competitor solutions. Opens up any node in separate view, hiding all surroundings.
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Pro
 Turn your email into a todo list

Moo.do has an application for gmail that lets you fully organize your emails and turn them into a todo list. E-mails can be organized into different folders including what needs a reply, the priority levels, what is completed etc.
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 Easily filter data using tags

You can #tag words anywhere throughout your notes in order to easily find them and keep similar notes organized.
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 Agenda panel lets you see all your tasks

You can use tags like @next, @today, @tomorrow, and you will see all your tasks in agenda panel.
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 Well designed interface

The design of the interface was well thought out. Despite the abundance of features, the interface is intuitive to navigate. It has a very clean, minimal design.
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 Offline editor

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 Indefinitely nested lists of items

There is no limit to how many nested lists you can create. This gives you a lot of freedom structuring your ideas.
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 Lets you view multiple panes

The multi-pane feature allows you to view lots of information on the same screen so there is no need to frequently switch between pages.
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 Very fast to use

Very fast application which is useful when you want to brainstorm. No lags at all.
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 Multiple priority levels

You can quickly tag any of your content with one of the priority levels to help you stay organized and address the most important tasks first.
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 Very easy to get started with

Despite having many different features, Moo.do is extremely intuitive to use right from the start.
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Con
 No wiki-style cross references

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 No API

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 Markdown

Markdown support.
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Con
 Interface can feel distracting

Moo.do offers a variety of features that can make for a distracted experience. Rather than being encouraged to focus on the task at hand, you may find yourself tempted to flip through other panes.
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Con
 Inability to add images to the outline (no longer true)

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 See an overall view of tasks via "Perspective"

The Perspective section allows you to see an overall view of the tasks you have set. It also allows you to set contexts or see things you have flagged.
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 Excellent full stack support from phone, to tablet, to Mac

With very good synchronisation.
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 Best support for GTD in the marketplace

This really supports the implementation of David Allen's Getting Things Done
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 Client side encryption

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 Forecast summary

The Forecast Summary shows a quick glance of the tasks you have that day. You can tap on any day to quickly see what tasks you have planned that day. For extra functionality you can connect the iPhones Calender app, which allows you to also see any other events you have planned that day.
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Pro
 Organize tasks into projects

OmniFocus 2 allows you to organize tasks into Projects, allowing you to keep your tasks organized in the best way to stay efficient for that project. Each task also features summary dots. For example, red means the task is overdue and orange means its due soon. There is also a range of other dots that can be specific to projects.
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 Great for people who need their hands free because it can work with Siri

You can set it up to dictate your list to Siri, which is pretty handy when you're really busy or you need to drive.
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 The first and only invisible TODO list app for developers

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 Beautiful design

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 Auto schedule

Plan the entire day with a few taps.
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