MUTE : Web-based text editing tool that allows to edit documents collaboratively in real-time. It implements a CRDT-based consistency maintenance algorithm f...
HedgeDoc : HedgeDoc (formerly known as CodiMD) is an open-source, web-based, self-hosted, collaborative markdown editor.
You can use it to easily collaborate on ...
RegExr : RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp).
Etherpad is an Open Source online editor providing collaborative editing in really real-time powered by Node.js
