Didactor is an Open Source E-learning environment, written in Java and built on top of MMBase (http://www.mmbase.org). Didactor consists of over 20 didactic components, like e-portfolio, assessment, competence management, group discussion, chat etc.
CAIR is an e-learning project that allow users and subjects management. You can associate pupils and teachers to subjects and works for this subjects. There are special functionalities for those subjects related to Robocup development.