D2L - Desire 2 Learn

D2L is an eLearning authoring tool that many colleges use. Instructors build their course content in their shells and they can share their content easily with other instructors. It's great for discussions, quizzes, and papers/homework. You can even make students turn their papers into a plagiarism checker. It does have a blog section, but the blogs are not tied to grades or even a course. It does rooms chat rooms.
Pros- It's fairly easy to use. You can share your content and do your own course copy.
Cons- course copies are pretty touchy. Perhaps this will change in a future version. It would be nice to see blogs connected to the grade center and a course.