Blitz is still available on the amiga and still developed
for the amiga
it's called AmiBlitz now and there is a mailing-list
and a homepage for it at
http://blitz2000.gazchap.com/btw. PC-Blitz 3D support isn't very good.
a mini-gl/warp3d blitz lib for amiga-blitz would probably
blow it out of the water.