SimLeague Baseball gives you a salary cap and lets you manage your own 25 man team of baseball superstars from the years 1885 through 2005.
This is actually quite cool. SimLeague Baseball has a seriously sophisticated system for staging games (and seasons) between teams of players chosen from throughout baseball history. Perhaps it's not a 100% perfect way of seeing how Ty Cobb might do against Roger Clemens, but it's sure a hell of a lot of fun. It's all done online and there is a reasonably small fee for each season. But in this case that's a very good thing because it'll minimize the likelihood of owners not paying attention to their teams. We give SimLeague baseball a simulated thumbs up.