I'm tired of making a thread every time I find a deal for a free game, so I'll just start a thread to put some stuff on. I tend to find something about once or twice a month anyways, so it will get updates.
ign.com does a free game of the month and this month is Deus Ex: The Fall for iOS devices. Probably the best attempt at a modern videogame ever done for phones/tablets. That new Blizzard thing might be better, but I don't really play games from Blizzard.
Also, for iOS is Limbo for .99. Don't know how long this sale is going on for. Sorry AndroidBros.