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.

LibHunt - LibHunt tracks mentions of software libraries on relevant social networks. Based on that data, you can find the most popular projects and their alternatives.

Google's Python Class - Assorted educational materials provided by Google.

GitNews Web - Trending repositories from GitHub, HackerNews & Reddit

A Byte of Python - A Byte of Python is a Python programming tutorial and learning book that teaches you how to program with the Python programming language.

Ruby Toolbox - Explore and compare open source Ruby libraries