Mesa is an OpenGL clone, (Lib-GPL). It includes demos, so that you can see what kind of 3-D rendering it does. You might prefer to install into /usr/src/mesa, eg by creating a sym-link.
ftp iris.ssec.wisc.edu
tar -zxf ...
cd /tmp/pkgs_ftp/Mesa-1.2.6
make
make linux-elf
(takes as long as the kernel)
su
vi /etc/ld.so.conf # add /tmp/pkgs_ftp/Mesa-1.2.6/lib to list
ldconfig