http://bscl.fit.fraunhofer.de/en/

Synergeia
Synergeia is designed to support collaborative knowledge building in classrooms of schools. It provides a shared, structured, web-based work space in which collaborative learning can take place, documents and ideas can be shared, discussions can be stored and knowledge artifacts can be developed and presented. Teachers can structure, seed and guide work in Synergeia to facilitate knowledge building in their classrooms.
Synergeia is a software system developed within the ITCOLE research project funded by the European Union in 2001-2003. The Synergeia system combines an asynchronous component named BSCL (Basic Support for Cooperative Learning) and a synchronous component named MapTool.