Wilber is the GIMP mascot, and a cute one at that, too!

"When I first saw Tuomas Kuosmanen's little GIMP-created creature, I felt like I had to adopt it. It's just so cute. It's not a cat or a dog or a fox or a wolf. It's a gimp, and its name is Wilber. Wilber the Gimp. Got kind of a nice ring to it, I think." (Zach Beane in GIMP News)

Wilber the Gimp lives with Wilma the Gimp, who appeared in the Valentine's Day 2000 splash screen image of GIMP 1.1.17.