As someone who has purchased art software from Adobe for bazillions of dollars, Aviary is very cool and free.
There are several bird-named applications and they do amazing things to pictures and the creative process.
Pierre, right, was created by using their Raven application which is like Adobe Illustrator. He was imported to Pheonix their Adobe Photoshop-esque application and placed before a downloaded picture of Paris circa 1925.
Check it out at http://www.aviary.com/