iPath is providing an free and open plattform for "case based collaboration", especially designed for medical applications (telemedicine, etc). The iPath-Server package provides a sort of medical BBS to discuss/consult cases online. Additional modules
Intelligere SCS is a collaboration system with an integrated web conference system ideal for virtual classroom, e-learning and video conference. In order to view an on-line demo use this address http://tinyurl.com/scsdemo (user and pass 'sfguest').