A useful tool that's also fun.
Deevid is actually a lot of fun. I'm an artist, and I sometimes use it to do brief animations of my artwork for YouTube displays. I'm still learning how to use it, and I think the program is learning what I want. It makes mistakes sometimes, and adds things I didn't ask for, but that's all part of the learning process. I've used it to generate background music, too. Of course, it doesn't always get it right, but it's getting there.