Etherpad

Etherpad allows you to edit documents in collaboration with other users. Changes are shown in real-time, so that the other users can see them immediately.

To use Etherpad you just need a modern browser and a working internet connection. Go to https://etherpad.gwdg.de to create a new pad or to https://etherpad.gwdg.de/p/existingpadname to open an existing pad.