Not sure which ones you'd consider weird 😉
The mobility radeon 9600 from Danger Manfred is weird in my world.

I don't have any 3dfx cards in my collection, so that'd be on someone else.

I only have a V3 3000 AGP - would have to test that in a different rig from the others, because my normal benchtable is incompatible with the oldest AGP cards (ASRock ALiveDual-eSATA 2, AMD Phenom II X2 555 Black Edition @ 4GHz, 2x2 GB DDR2 1066 CL5-5-5-15).

I do have the Radeon 9000 series mostly complete (no 9700 Pro) and most of Geforce 2 to 7 cards, too. Even some unicorns like the Mobility Radeon 7000 and 7500 cards by Vampower which carry additional power for professional displays. Or the Geforce 6600 LE, I guess that one's for masochists.
The Medion Radeon 9000 cards might be considered weird, too: Radeon 9600 TX (sounds like a 9600 XT but is actually a 9500 Pro with cheaper TSOP RAM with more loose timings but making up for it with higher clockspeed), or the 9800 XL (XT core but below Pro clockspeeds and cheapo RAM) and XXL (also XT core, but almost XT clockspeeds and cheapo RAM).