Learnable
www.learnable.com
Brought to you by Sitepoint. They have created a site to host their on-line classes and a place for people to create their own as
well.
Udemy
www.udemy.com
Just checking this one out, I found some interesting courses, but many seem to be placeholders for classes to come later.
LiveMind
www.livemind.com
Just read about this one and have not looked thorugh it very much yet.