Free, online LMS which seems to be used at some of the Ivy league American universities if the home page is to be believed... Includes discussions, calendar, library (for your resources) and a gradebook.
A branded but fairly standard Moodle setup run by University of Capetown reported to be the kind of LMS portal that the new Dean of Management is very keen on (via Michele Schoenburger-Orgad)
eStudy, a German open source LMS, features student-created activities and courses. Courses can be ordered by the number of activities using clouds. Via Prof Zinke.