LinkedIn Learning - Online training through LinkedIn's professional network.
Google Open Source - All of Googles open source projects under a single umbrella
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.
Open Source @IFTTT - A collection of IFTTT OSS projects.
Fluany - Everything you need to force your mind to learn
Code NASA - 253 NASA open source software projects