1. MarkdownpresenterUpdate: Follow link to recommended fork. For when you're giving a presentation in half an hour, and you haven't got the time to open up keynote...
6. iPhoneAutoTranslateAutomatically translate your iPhone app's Localizable.strings into all languages using Microsoft Translator
7. gondolaGondola: Media server that runs from an old laptop / RaspberryPi
8. cryptoDeliberately simple, thoroughly commented AES/DES/etc crypto implementations in various languages, for learning purposes.
9. MegaCometA comet server that will (hopefully) be able to handle 1 million (eg mega) connections.