Try Sakai
If you’re curious about the Sakai collaboration and learning environment (CLE) project, you can download a demo that is mostly functional. I got it running here on OSX in no time at all. The only tricky thing for me was that I’ve never run a java app on OSX so I didn’t know what the java environment variable needed to be (it’s /usr, so export JAVA_HOME=/usr). I also had problems running out of memory, which the readme addressed: export JAVA_OPTS="-server -Xms512m -Xmx512m -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCTimeStamps".
The biggest disappointment has been that I’m unable to get the assessment features to work–I can create an assessment but when I try to take it I’m not presented with the questions and a message that I’ve answered 0 out of 2 questions. 
I’d like to see how folks manage this in terms of creating classes every quarter, enrolling students, etc.. Well, I’ll wait for OLN’s demo!
