Bootstrap 4 Cheat Sheet - An interactive Bootstrap 4 cheat sheet
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.
Bootstrap Zero - Open-source, free Bootstrap templates collection.
Udemy - Online Courses - Learn Anything, On Your Schedule
HackerThemes - Bootstrap 4 themes and tools for web developers
Moodle - Moodle is the world's most popular learning management system. Start creating your online learning site in minutes!