Spyder3Elite v4.0 Upgrade Software (Northlight Images)
Monitor and projector calibration, with ambient light measurement
The Spyder 3 Elite is a good monitor profiling package that I've often used on equipment here at Northlight.
Recently, Datacolor have announced a new release (V4) of the software that does the calibration and profiling.
Whilst very similar in operation to the original software supplied, it adds a number of features aimed at improving the quality of calibration and profiling, and others aimed at more advanced users wanting to quantify aspects of their monitor's performance.