FxCamera
I love downloading and trying out new applications on my Android phone. One I have been playing around with lately is FxCamera. In FxCamera you can shoot photos in 5 different modes, Toycam, Polandroid, Fisheye, Symmetri, Warhol and normal. The controls are easy enough to use and the different modes have settings you can configure. I think it is a fun application to play around with plus it is free to download.
Here are some examples of photos I have taken using FxCamera, using the default settings in the mode
