A good image editor that offers a multilingual, FREE api to integrate (they can charge fees if the volume of transactions is really high tho, but nothing upfront) is http://www.picnik.com

Flickr uses it as image editor for example, with their own branding of course.

Check this out:

http://www.picnik.com/info/api

http://www.picnik.com/info/api/samples

Regards,