From BlenderWiki

Other supported operating systems

FreeBSD

Download the file blender-2.##-FreeBSD-####.tbz from the Blender download page where 2.## is the Blender version and #### is the machine architecture (i386 or amd64).

To start Blender

• Unpack the archive
• Open a shell and navigate to the unpacked archive's directory
• Execute the command ./blender while the X.Org server is running.