I forgot to mention this freebie in my monthly survey post. Ajax Spacemen were apparently the 1940s pulp space-opera figures that George Lucas played with as a kid on his carpet. The freebie is for Poser, designed for the free 3D&D Klingon standalone for Poser.
I did a little research on the copyright status. The line of toy figures was apparently introduced to the U.S. market in 1947 and then the Ajax Spacemen design in 1951, with “patent pending” noted on the boxes. A U.S. Design Patent then lasted 15 years. Thus I would suspect this design is now public domain, and has been since the 1970s, but don’t take my word for it if making commercial renders.