Co FFEE
CoFFEE is an open source software for computer supported collaborative learning (CSCL) in a digital classroom. Unlike most CSCL envirmonments, CoFFEE is not designed for and indeed does not currently support distance learning, but is rather focused on facilitating group interaction within the classroom.
CoFFEE offers customisable tools for group collaboration, knowledge sharing and representation, such as a threaded discussion forum, a graphical concept mapping tool, dynamic voting and others. It has so far been translated into French, Spanish, Italian, Dutch and (experimental version) Hebrew and is being used in schools, colleges and universities in the UK, France, Italy and the Netherlands.
CoFFEE is open source and free software released under the Eclipse Public License (EPL). The CoFFEE project is hosted at Sourceforge and offers all the regular tools (SVN, bugtracker, forum etc.) that you might already be familiar with when working with Sourceforge.
Read more about Co FFEE: Origin of The Name, Awards, Overview of The Software, Pedagogical Work With CoFFEE