This program will help you to calibrate your LCD or CRT displays without any hardware devices for these desirable values:

Gamma: 0.1-5.0. Value 2.2 is recommended (PC and Mac standard)
White Point: 6500K
Luminance Level: 80 cd/m2
Color Space: Monitor settings, usually sRGB

Lutcurve based on using neutral-color sensitivity of the human eye. The software specialized gamma test pattern computations are based on an article “Measurement of display transfer characteristic (gamma)” by A. Roberts.

The program, unlike popular gamma calibration tools, ensures highly precise calibration, which is typical of hardware. For example, gamma correction utilities can only bend the gamma curve to make the monitor display an image with an accurate gamma value.