I recently reviewed this app on my e-Learning blog, it was good value then at 69p, however for this weekend Halftone is free, so well worth checking out.
What it does is take a photograph and convert it into a comic style image that can then be used on a blog, in a presentation, or on a print document.
Tthis is a nice simple cheap free app that allows you to create a vintage comic panel from one of your photographs in a particular style.