Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
Moodle - Moodle is the world's most popular learning management system. Start creating your online learning site in minutes!
Anchor CMS - Free and lightweight blogging system
Collaborator - Система дистанційного навчання повного циклу із аналітикою в реальному часі та інструментами внутрішнього маркетингу.
Textpattern - Textpattern is an elegant content management system that is free, open source software.
Lessonly - Getting teams up-to-speed and keeping them there.