Simple and fun, upload an image and convert it into asciiart.
BeFunky lets you give various artistic effects to your photos. Just choose an effect, upload the photo, tweak some settings and you have an instant professional sketch or cartoon or an ink drawing!
TiltShiftMaker allows you to transform your real life photo scenes into miniature models. Just upload the photo, choose the area to focus on and presto you have your effect.
Looks great on photos of city scenes, mountains where the whole aspect of the scene has been captured in the image as opposed to a single object.
If you would like to create a photo mosaic or collage, check out pixisnap and photovisi.