ILIAS is a web base learning management system (LMS, VLE). Features: Courses, SCORM 1.2 and 2004, mail, forum, chat, groups, podcast, file sharing, authoring, CMS, test, wiki, personal desktop, LOM, LDAP, role based access, see http://www.ilias.de/
Calendar: Course/Group/Personal Appointments, iCal export
Demo Installation at http://demo.ilias.de
Mediacast: Audio and Video, RSS, iTunes Links.
Personal Desktop: All personal information for a single user
Search: All resources and file types, word, pdf, forums, ...