Construx: Construx Estimate

"Construx Estimate contributes to project success by helping improve your software estimation capabilities. Estimate leverages a blend of proven estimation models to predict effort, budget, and schedule for your project based on size estimates. Estimate comes calibrated with industry data, but is most powerful when calibrated with your organization's data.
As part of our mission to advance the art and science of commercial software engineering, we provide Construx Estimate™ version 2.0 free of charge with a limited license."

Construx is the group that Steve McConnell (of Code Complete) runs. Great book, interesting tool. Thanks Boudewijn Lutgerink.