Eddyspeak is an orrigional translation content management system. It allows you to translate GNU GetText PO files using a browser. This allows a comunity to work on the same file at the same time and speeds up development. Uses: PHP, MySQL and Python.
FiftyTwo is a collection of card games for the OLPC XO laptop specifically, though because it is written in Python, it should run on other platforms as well. For more details, see http://wiki.laptop.org/go/Games/FiftyTwo