Khan Academy unveils its new interactive Computer Science learning platform. More coder resources: Free Tech Books, WiBit.net, Google Code University, the W3C's Web Standards Curriculum, a Beginner's Guide to HTML & CSS, and codepen.io, a social sandbox for web design.
"Rosetta Code is a programming chrestomathy site." Each page describes a programming concept or task, then lists how it's implemented in dozens of programming languages. Useful for learning a new programming language, especially if you're already familiar with how to do it in another language.
"Hello, world!" in 114 programming languages. Whenever picking up a new language, it's customary to write a program that prints "Hello, world!" to see how one goes about writing anything in said language. Now you never need be curious about what language to write your custom-designed CMS in.