I setup etherpad and showed my co-worker, and he swears there is an Eclipse plugin that does the same thing but can not remember the name. Neither of us use Eclipse regularly except if we were both interested in making the switch.
Have a look at http://wiki.eclipse.org/DocShare_Plugin
This is the current "official" solution to collaborative editing in Eclipse.
Have a look into Saros project: http://www.saros-project.org/
VonC
I think a similar project should exist based on the framework ECF. (DocShare as mentioned by Tonny Madsen)
There was a SOC project for real-time sharing named Cola, but I don't know its current status.
来源：https://stackoverflow.com/questions/9156449/is-there-an-eclipse-plugin-for-collaborative-editing