The incomparable Narmer over at Dynasty Zero has put together a great list of TFT clones. You should be sure to check ’em out. TFT (The Fantasy Trip, if you don’t know the acronym) was the first game that I truly loved. I played it way more than I ever played any form of D&D when I was a kid. It completely dominated my youthful geekness (alongside Traveller) and is, in my opinion, one of the finest RPGs ever produced. It’s a cryin’ shame that it was never more widely known.
TFT is also, in case you’re not familiar with this part of RPG history, the progenitor of GURPS. It’s also much, much better as far as I’m concerned. It’s lighter, faster, and much more fun to play than its unwieldy offspring. And though I have no need of a clone of it, I highly recommend giving the game serious consideration if you’re looking to add something new to your repertoire.