NEO LMS is the BEST Learning Management System. I have never seen anything like NEO before.
OpenToonz - OpenToonz is an animation program that is a free software version of Toonz, the animation software...
schoology - An online learning, classroom management & social networking platform that provides educators & students w/ more effective, efficient & engaging ways to learn.
Synfig Studio - Just another WordPress site
Canvas by Instructure - The Canvas LMS is the world's fastest growing learning management system. Check out favorite features and schedule a live demo!
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Edmodo - Where Learning Happens