Aviary Editor WordPress plugin by bainternet intergrates Aviary editor In your the WordPress Media Library. This plugin makes calls to Aviary’s API server for saving images.
Aviary offers basic image editing to manipulating complex effects, Aviary’s Advanced Image Editor delivers essential key features available in powerful desktop clients right through your browser. Aviary provides its users with an easy-to-use and accessible application that will spawn creativity and sharing with every use!
Aviary homepage: http://www.aviary.com/
Download: http://wordpress.org/extend/plugins/aviary-editor/