Juicy Bits has Halftone (iTunes Link) in the iTunes App Store for FREE (regularly 99-cents) for a limited time.

Halftone adds an aged halftone-style printing effect to photos to give them a unique, vintage look. With 27 paper styles, nine built-in layouts, two caption styles, six different speech balloon styles, 24 stamps, and the ability to choose a font (including three embedded fonts), photos can be customized, then saved to the photo album, sent via e-mail, shared with friends on Facebook and Twitter, and printed.