Udemy - Online Courses - Learn Anything, On Your Schedule
Readwise - Effortlessly rediscover and organize your Kindle highlights
Moodle - Moodle is the world's most popular learning management system. Start creating your online learning site in minutes!
Knotes - An efficient, beautiful Kindle highlights & notes manager
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.
Clippings.io - Organize the notes you make on your Kindle