Paint.NET is freeware developed by Washington State Univeristiy. I think it is the best photo editing freeware in the world. A lot of people usePhotoShop, but for a free alternative Paint.Net is awesome. They also give you extensions on their website.
brbrSome pics I edited with Paint.Net (Google Image Search found the pictures.):brbrbrimg src="http://clabedan.typepad.com/photos/uncategorized/mercedes_cl_photoshop.jpg"brbrbrimg src="http://i9.photobucket.com/albums/a96/SonicChao05/mercedes.gif"brbrMy favorite ^ making them look like someone drew them.brbrYou can also blur, opacity, make Black and White, Magic PaintBrush and a ton of other things on this!brbrP.S. Like Photoshop, you also get layers.br