Etherpad

Etherpad is a website that allows you to edit documents in real-time with other users that you collaborate with. You are able to write articles, press releases, to-do lists, etc. with your friends, fellow students/colleagues all at the same time.  Etherpad has all instances accessed to all data through API and you are able to import/export data exchange formats. Etherpad, in my opinion, is very similar to Google Docs. They are both free and allow collaborative editing. However, Etherpad offers some more features than Google Docs such as: a built-in chatbox, import/export in various formats, multi-player editor, etc. Etherpad is a free website, and it supports integration with a lot of third-party apps like wordpress, mediawiki, dokuwiki, etc.


Link: https://etherpad.org/