Taskwarrior is an open-source cross platform command-line task management tool. It allows you to capture, annotate, manipulate and present your tasks, then sync them among devices.
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Taskwarrior has many front-ends, services, extensions, hook scripts, and capsules available. Taskwarrior keeps a list of contributed tools on their site.
Pro 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.
Pro 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.
Pro Supported internationally
It has UTF8 support and is translated into many languages.
Pro Tasks stored in plain text files locally
Future-proof and easily integrated with version control system. You never lose access to your data.
Taskworrior allows you to define custom attributes and reports to your needs.
Pro Self-hosted Taskserver
You can be in full control of your data.
Pro Lightweight and fast
Taskwarrior is written in the speedy C++ language.
Con Command line interface
A command line interface is a arguably overly verbose, consequently tedious, way to interact with a To Do list.