Na wat kerfuffle op Unraveled over het al dan niet stelen van CSS staat plots dit in de source code van de desbetreffende pagina op Freshly Squeezed Software:

  These CSS tabs were developed with the help of the sites listed below. You are free
  to steal them without giving any credit whatsoever. Enjoy!

  Other useful tab sites:

Ooooooh! [handbag]