So... Stardock is copying Nimi? ... wow, ok.
Actually WindowFX has been offering advanced animations since WindowFX 2 on Windows XP including wobbly windows. Here
is an article from 2002
about WindowFX 2 including a link to a video that still works of WindowFX doing animations on XP.
As the lead developer I naturally have a bias, but I believe that without taking anything away from the Nini Visuals author, it is fair to say the animations including Wobbly Windows (Classic WindowFX style and Compiz style) in WindowFX 5 on Windows 7 are in a different league to the ones in Nini Visuals. Why not try it out and see?