Warp Camera can take photos through special distorting lenses for funny effects. The app can also edit existing pictures in your pictures folder. You can warp shapes to e.g. make people look thinner or fat or alien, and pictures can be cropped and rotated. Picture color, contrast and white balance can be adjusted, and details can be corrected with the retouch brushes.
You can also the camera to record time lapse videos, or you can combine existing series of pictures to videos, tone mapped HDR images or star trails from night sky pictures.