Pixlr-o-matic is a flash-based webapp that allows users to add effects to images in a way reminiscent of Hipstamatic on the iPhone. The process moves the user through three processing steps, which mimic the effects of old film/developer combinations, lenses, and cropping. Images can either be snapped via webcam, or uploaded to the site straight from the computer. The whole thing takes about a minute, and finished images can either be saved when finished or shared directly through imm.io, which is Pixlr's own image-sharing service.
