The systems we have been playing in most recently include Immortal: The Invisible War and Palladium, mostly their Rifts, Heroes Unlimited and Nightbane settings.
We have also recently experimented with the World of Synnibarr, a very interesting game that caught our imagination. While we aren't playing in it currently, I'd like to come back to it at some point. In the meantime, I have put a few useful character generation tools online.