Photo Mixer is a photo blending application which allows you to create amazing looking photos by combining them using different filters, shapes, linear combinations, and transparent images.
Homepage: http://www.pcwinsoft.com/mac-photo-mixer/
Giveaway: http://www.pcwinsoft.com/promotion/BitsDuJourPhotoMixer/registration.asp
Download: http://www.pcwinsoft.com/download/PhotoMixerInstall.dmg