When I get bored, I make random generators. Mostly story/plot or art prompt generators, but there's also one for pub and tavern names, and a collaboration with Yoon Ha Lee on a Tarot-type card reading generator based on the Machineries of Empire series.
Inspired by the awkward phrasing of Automatic Caution Door signs, I made an automatic caution sign generator.
I've developed my second iPhone app, Robo-Haiku, which lets you generate random english-language haikus that are bizarre, humorous, and sometimes cynical. They can be tweeted or emailed to your friends. It's free, and supported by advertising. [more inside]
Generates random band names and albums w/covers. Integration with Facebook and Google Image Search. (Possibly NSFW) [more inside]