This is a GTK2/GTK3 theme based on the look of Solaris 8/CDE. Intended for people who appreciate retro styled stuff.
Edit - March 2017:
Note that this is from 2012 and until very recently, GTK3 was getting constant updates that broke themes. So this theme doesn't work at all. Now that Gtk3's theme API is finally stable, I might eventually release a working version of the theme.