When comparing Gitit vs Memosnag, the Slant community recommends Gitit for most people. In the question“What is the best cross-platform note-taking app?” Gitit is ranked 36th while Memosnag is ranked 63rd. The most important reason people chose Gitit is:
Giti has a multitude of formats that it allows to be exported, including LaTeX, ConTeXt, DocBook, RTF, OpenOffice ODT, and MediaWiki markup.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Lots of export formats
Giti has a multitude of formats that it allows to be exported, including LaTeX, ConTeXt, DocBook, RTF, OpenOffice ODT, and MediaWiki markup.
Pro Supports markdown
Getit supports markdown, a plain text formatting syntax that is designed so that it can be read by HTML.
Pro Free and open source software (FOSS)
Licensed under GPLv2 so you can download source code and customize to meet your needs, provided that you know or are willing to learn Haskell.

Pro Can be used collaboratively by multiple people

Pro Renders math
Using MathJax.
Pro Extremely simple and intuitive
The plugin is very easy to use. The social-media-like page layout makes it easy to navigate, while the drag-drop functionality, used to organize your content, is highly intuitive as an Evernote alternative.
Pro Automatic citations save time
Memosnag creates citations automatically, which saves the user a ton of time.
Pro Lets you save pretty much everything online
Unlike other clippers, memosnag allows you to save pretty much everything online in one simple click. That includes images, YouTube videos, websites, etc, which makes it a good Evernote alternative in this area.
Cons
Con Requires Haskell
On some Linux platforms a binary package for Haskell may not be included in the standard repositories. So, it will be necessary to compile Haskell from source code or find a non-standard package repository, which may seem like a hassle if you don't use Haskell for anything else.
Con Comments can only be written in Latin script
You cannot add comments in Cyrillic, or Hebrew, or any language that uses symbols other than the Latin alphabet.
Con Does not work well for note taking
Memosnag is only for saving/sharing content you've found online (sites, videos, etc.).
