FX Photo Studio for Mac

From MacPhun:

FX Photo Studio is a unique app with 213 high quality effects and filters. Combine and layer any of the 172 effects to create the perfect looking image. A completely customizable interface allows you to preview each effect, compare original and resulting images, label favorites and even save combinations of effects as presets.

You can apply as many filters to one image as you like, save mixes of effects to presets and even share these presets with other photographers around. The new masking and color splash tools allow you to apply effects and colors to a part of the image only, giving even more creative freedom to your photography. Categories of effects include: Lo-Fi, Grunge, Art, Sketch, SFX, Hollywood FX, Cross Process, Vintage, and more. Created by usability and photography professionals, FX Photo Studio's user interface ensures that editing your photos can't get any easier.

With a click or two, you can apply and customize effects, access all editing tools, apply random effects, preview original and resulting image, import images from Aperture or iPhoto, share photos via social networks and more.