Alcamy - Free, open self-learning platform. Learn & teach anything.
Collapsed - Learn lessons from failed startups
EduDo - EduDo is a video discussion platform
High Signal - High Signal is a small community for founders making revenue.
Lrnkey - Lrnkey.com is a global online marketplace that easily connects you to live instructors and tutors across the planet.
How not to launch - Learn lessons on failed products and startups