I made a tabletop system - haven't done any serious testing of it yet, just really early stuff. Here's the link to the "Alpha 0.02" version of the guide. It's a full-sized guide, so expect to spend some time on it if you click. Still, I would appreciate you telling me how opaque it is, what's cool, what needs clarification...
(The bookmarks work, so that's handy.)
It's kind of like Stargate: SG-1, except you travel through time instead of space. And it's evil. EEEEEEVIL!