GemRB, from their website doesn't look that active, but checking their IRC channel shows there is work being done what appears to be almost every hour of every day. It's still far from complete (especially for anything other than BGII) but it's making good headway. It's stupidly fast too.
Eventually, it -should- support:
Icewind Dale 1/2
Baldur's Gate 1/2 (and expansions)
Planescape Torment