Domino is a nice widget style and window decoration client for KDE 3, written by Michael Lentner. You can find it on kde-look.org.
After porting deKorator, I revisited the Domino sources, and did a quick port of the Domino KWin window decoration client to KDE 4.
This version needs Qt3Support libraries and issues dozen of warnings during build, but it seems to work.
The Domino widget style has not been ported, please do not ask me about it.
Happy Christmas holidays!