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Blender is a fantastic 3D animation/modeling suite for various platforms. (this being the version for PowerPC versions of Mac OS X)
blender-2-48a-py2-5-OSX-powerpc.dmg (17.53 MiB / 18.38 MB)
/ DMG image
Mac OS X 10.3 + (PPC)
You probably want the latest version if you have a newer computer. I reccomend against using this in an emulator.