Tutset - Curated list of the best programming tutorials on the web.
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.
Snipper.io - Collaborate with your friends on the same code in real time
Quick Code - Curated list of free online programming courses
Code2Flow - An easy solution to create product flows.