Cameron Cohen was diagnosed with a tumor in his leg, and while it wasn't cancerous, he did need to have it removed, resulting in 9 months of recovery in a cast. To while away his time at home, he learned how to write iPhone apps, then created iSketch, a 99 cent drawing program. Think the story couldn't get any cuter? He's donating most of his profits to the hospital where he had the surgery. Read more.