Probably not anything out there. You can try running the games, and maybe they have some kind of fallback mode when they don't find a 3dfx chip... There's also a chance if you have an nVidia card, they folded some of the extensions into their cards when they acquired the company some years ago.
I was browsing some old gaming titles at a local Half Price Books store, and came across a couple of old...no...ancient gaming titles I missed back when they were in their prime. Considering the el-cheapo prices, I thought it would be cool to finally experience them...until I happened to check out the system requirements.
Suffice to say that it's been a LONG time since I or anyone else that I know has had a Voodoo-compatible video card in ANY of its generation iterations. Ignoring (for now) the faster CPUs we have these days, does anyone know if there any driver hacks that might allow these old 3Dfx games to run with a current-day vid card?

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