Udemy - Online Courses - Learn Anything, On Your Schedule
Linked Ideas - A macOS/iOS apps to treat ideas as links of concepts.
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.
Freeplane - Freeplane is a powerful and free software for building mind maps.
Moodle - Moodle is the world's most popular learning management system. Start creating your online learning site in minutes!
vym - VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts.