Colorvision ColorPlus
(USB, Windows 2000 or XP only)

This is the cheapest hardware calibration device that we've found on the market. Based on the old version of the Spyder (which we have used and can happily recommend), this is a simple, easy to use device that will accurately calibrate your CRT, LCD or notebook monitor with the minimum of fuss. Not many advanced options, but for the average user they won't be missed.

Links :

Colorvision (with feature list)

PhotographyBlog Review

PC World Review