Udemy - Online Courses - Learn Anything, On Your Schedule
TinkerTool - Tinker with the hidden settings of your Mac
Adobe Learning Manager - Adobe Learning Manager (formerly Adobe Captivate Prime LMS) is easy to setup and helps in delivering engaging learning experiences in a personalized manner across devices.
Onyx by Titanium - This website provides operating system utilities for macOS
Moodle - Moodle is the world's most popular learning management system. Start creating your online learning site in minutes!
Cocktail - General purpose system modify/repair utility