Udemy - Online Courses - Learn Anything, On Your Schedule
Anima App - Design, get feedback, convert to code, publish, iterate.
Moodle - Moodle is the world's most popular learning management system. Start creating your online learning site in minutes!
Sketch Repo - Collection of resources for anyone who uses Sketch
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.
Auto-Layout for Sketch - Responsive design for Sketch