Windows only: Free application Calibrize holds your hand through a simple three-step monitor calibration to ensure on-screen colours look the same from computer to computer. Once you've run the application and adjusted the colour profile to its specifications, Calibrize saves the profile and automatically installs it on your system so the right colour profile always loads up. It's quick and simple, especially if you don't know much about screen calibration to begin with. For a no-download alternative, check out previously mentioned Screen Check. Calibrize is freeware, Windows only.