Microsoft Threat Modeling 3.0 & Optimization Model tools slated to release in November 2008
Microsoft is planning to roll out new version of Threat Modeling Tool 3.0 in November, 2008, which focuses on the software design process, with built in guidance and advice into the tool. Also shows what is the [security] implication of a design, and gives a chance to learn about security in a way that's broader than just vulnerabilities.
Microsoft will also roll out the Optimization Model in November, 2008. Another free download, it is designed to show an organization where it currently stands on the secure development front and then helps it move toward a broader use of the SDL techniques.
Both the tools are free & helps in writing more secure code.