When comparing Quiver vs 3Cols, the Slant community recommends Quiver for most people. In the question“What is the best code-snippets manager?” Quiver is ranked 6th while 3Cols is ranked 12th. The most important reason people chose Quiver is:
Quiver is a notebook and note-taking app akin to Evernote which happens to also be able to edit Markdown files. As such, it has a lot of useful features such as: image support, file attachments, web content support and more.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Has more features than just a simple Markdown editor
Quiver is a notebook and note-taking app akin to Evernote which happens to also be able to edit Markdown files. As such, it has a lot of useful features such as: image support, file attachments, web content support and more.
Pro Supports code highlighting
Has syntax highlighting for more than 120 programming languages.
Pro Notes can be linked to each-other
Quiver notes have unique links that can be copied and pasted into other notes to gain quick access between them.
Pro Live preview
Quiver has live preview for both Markdown and LaTeX. This helps users to better understand the way they are formatting their files.
Pro Cloud syncing
Dropbox, iCloud Drive, Google Drive, or any other file-based cloud services.

Pro Supports vi keybindings
For people used to vi keybindings, Quiver can be set up to work with them.
Pro Combination of different types of writing in one note
The most outstanding thing for me. Use HTML line breaks while writing MD text.
Also, unlike most hybrid editors like Bear, it supports instant image sizing and respective preview.
Pro 100% Free
Funded instead from a Patreon.
Pro Easy to share snippets
You can either share with an account or an organisation, or if someone doesn't have an account yet, you can even just send them a link.
Pro Cloud based
Can be accessed anywhere on any device and installed via PWA.
Pro Export function
You can export all of your snippets in a .zip from the site.
Pro Easy to use
Pro Lots of different languages supported
There is syntax highlight support for over 25 different languages.
Pro Public snippet repository
While not always useful, it is interesting to look through the repository of snippets people have made public.
Pro API
Create your own custom software with 3Cols API and Nuget package.
Pro Fantastic editor
The editor is quick and easy to use.
Cons
Con You can't edit specific files, they must be in your notebook
Con No iOS apps for editing, only a viewer available
I'd LOVE to edit and create quiver notes on my iPad!
Con The line in focus shows a border around it which is distracting
The line in focus in the editor shows a rounded rectangular border around it, which is unappealing and distracting.
Con Much more than a simple Markdown editor
Since it's more like a note-taking app (and a note-taking app built for developers) than a Markdown editor, it may be a little excessive to use it only for its Markdown editing features.
Con May keep you out from logging in and accessing your snippets
Con No desktop version
Con Doesn't integrate with IDE
Con Super slow sometimes
You may not be able to login when you need to access your snippets.
