FEST

Fest is not as mature nor as complete as I'd like, but it is, at least, active, and maintained by a responsive team on a mailing list that actually gets messages now and again.

If I were sitting on a wealth of good Swing testing frameworks, I'm not sure that FEST would make the cut, but most of the frameworks for testing Swing applications have ancient, ugly APIs and no active developers or community members, so FEST scores a lot of points just for being out there, trying.