What learning management systems exists for Wordpress?

UPDATE: New WPMU DEV release CoursePress will knock your socks off :slight_smile:

I'm about to implement a learning management system on two sites. So far I found:

1. BuddyPress Courseware
2. Namaste! LMS
3. LearnDash
4. CourseMarketer
5. Sensei

I'm would like to know:

1. Have I missed any?
2. Does anyone have experience with these systems? Can you recommend a specific one?
3. Are there other online-based solutions that are preferred?