For those looking for free 3D models, there are some @
http://www.3d02.com/3d_model_index.asp?hddFree=1
http://www.3dheaven.net/models_main.htm
http://www.lowpolygon3d.com/

NOTE : I have not used these models, so cannot vouch for their quality.

or for 2D you might want to try
http://www.flyingyogi.com/fun/spritelib.html

If anyone has some other texture, sprite libraries, that others can use, please post a link on this thread.