Sketch Talk - A community for Sketch users of all skill levels
Udemy - Online Courses - Learn Anything, On Your Schedule
SketchCasts - A weekly screencast, all about how to use Sketch
Moodle - Moodle is the world's most popular learning management system. Start creating your online learning site in minutes!
GoRails - Ruby on Rails screencasts for Web Developers
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.