Check this out: Calibrize 2.0
Yesterday my company launched a new website to distribute a FREE color calibration utility. Calibrize is software that helps you to calibrate the colors of your monitor in three simple steps. Just download the software and follow the procedure to generate a reliable color ‘profile’ and adjust the colors of your monitor automatically.
all i got was: "server not found"
Yeah, weird how the calibrize website obviously shows a macbook or ibook in the "before and after" photos and then in small letters says No mac version available...not even...a "YET" at the end.
No Mac version available.

Igor Asselbergs started out as illustrator. He co-founded Tricolore, a color design consultancy in Amsterdam. Currently he is CEO of Colorjinn, a software company specialized in applications for color visualization. Igor is guest lecturer at a design college, a consultant for the paint industry, and has his own color blog, Livelygrey. http://livelygrey.com