Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
Udemy - Online Courses - Learn Anything, On Your Schedule
Anchor CMS - Free and lightweight blogging system
Adobe Captivate Prime LMS - Adobe Captivate Prime LMS is easy to setup and helps in delivering engaging learning experiences in a personalized manner across devices.
Textpattern - Textpattern is an elegant content management system that is free, open source software.
Moodle - Moodle is the world's most popular learning management system. Start creating your online learning site in minutes!