This site has some stuff in different formats, like a diamond in DXF format, alien & insectslegs in 3ds, bird in 3ds, snake in 3ds, a hairy texture map for the free Zygote Poser 3 model of Bigfoot, texture map for the free Zygote Poser 3 model of the Merbaby, a fish in obj, Explosion in bryce 4 .OBP format and bryce 5 file simulates a Kaleidoscope
http://www.petersharpe.com/Downloads.htm