This lists out all the major places on the web for courses, materials, and other stuff CS people need and basically empowers you to learn anything and everything you ever needed/wanted. You simply have no excuse anymore as to why you didn't know or learn something.
Quora's mission is to share and grow the world's knowledge. We want to democratize access to knowledge of all kinds—from politics to painting, cooking to coding, etymology to experiences—so if someone out there knows something, anyone else can learn it. Quora makes it easy to get your questions answered, share your own knowledge, and browse the most interesting information people across the world want to share.
Topcoder gathers the world’s experts in design, development and data science to work on interesting and challenging problems. Members are provided with opportunities to demonstrate their expertise, improve their skills, and win cash, while helping real world organizations solve real world problems. Topcoder has been hosting technical competitions since 2001 and is seen as one of the top online technical communities in the world.