befunky.com is a partially free image editing website that allows you to edit your pictures in the most fun ways. You don’t need to register, so that’s a bonus.
The free possibilities are very broad, but if you like the extra features, add-ons, layers, fonts etc. you can consider an upgrade for very little money.
On befunky.com you can literally add text to every kind of picture you imagine, as long as they are JPG or PNG.