Quinto Black CT - a Winamp skin.
Current skin version: 3.6, now with an installer!
Here is a nice Winamp skin called "Quinto Black CT".
It is made by PeterK.
It is a modern skin (*.wal) compatible with Winamp 5.666 build 3516, packed into a NSIS installer.
Don't forget to check out the included read_me.txt file.