What is a good color calibration software/program I can use that is fr

I need a color calibration software. I got a laptop and I have an ATI. I got the latest driver but the ATI color only works for the desktop and not my other programs (like games), which i want it to work on. Anyone know a good free program that will override any other programs color calibration with the way I like it. I only need the basic sliders, like brightness, gamma, contrast. Nothing to specific.