Love this infographic on the myths of open source software. At CX, we love open source software and use it ourselves. Read our blog about it here: http://blog.cx.com/cloud-storage-news/open-source-software/
“Invent Your Own Computer Games with Python” is a free book (as in, open source) and a free eBook (as in, no cost to download) that teaches you how to program in the Python programming language. Each chapter gives you the complete source code for a new game, and then teaches the programming concepts from the example.