And more aliens.

That doesn't count alien looking robot figures or mechs or toon figures that could pass for aliens. There are also loads of morphs for different human figures that can represent different alien and animal anthro characters. There are also tons of 3D non-posing models of different creatures.

There are probably a lot more creature figures that came out after I started getting into Poser and many commercial figures that I don't have (though I've picked up a good portion of the Sixus1 figures).

My visual indexes of Poser content are at http://www.sharecg.com/pf/rgagnon