Eh, at the moment a universal remote control app for my home theater. I expanded it somewhat for many other devices than I need, for friends and people on the AVSForums who requested things.

https://github.com/nicko88/HTWebRemote

It's not all that impressive per say, but a number of people seem to really like it.

Also an app to add a "wind" effect to a home theater as well.

https://github.com/nicko88/HTFanControl