Tutset - Curated list of the best programming tutorials on the web.
Marmoset - Create gorgeous code snapshots.
BigTube - Makes watching programming tutorials more fun
CodeShare.io - Realtime code sharing for developers
Hackr.io - There are tons of online programming courses and tutorials, but it's never easy to find the best one. Try Hackr.io to find the best online courses submitted & voted by the programming community.
RTCode - Real time code sharing web application