maderradar uses publicly available data and a few co-conspirators to create a crowd-sourced tracking mechanism for a single individual.
drakeomatic is a Markov text generator that analyzes Drake lyrics from genius.com and constructs tweets that are sometimes insightful, sometimes funny, sometimes quotes, and sometimes often complete gibberish.
playlightsout is a twitter port of Lights Out, and the first (as far as I know) graphical game on the twitter.
Some Other Projects
hxgk-flixel is a haxe library that adds Apple Game Center support to iOS projects developed using HaxeFlixel.
twixel is an iOS extension for HaxeFlixel that adds twitter support.
textmate-synthcity is a TextMate (or Sublime Text) theme based on Steph Thirion’s synthcity color palette.