MyAppSecurity's Threat Modeler is far more comprehensive than Microsoft's.http://www.myappsecurity.com/threatmodeler/threatmodeler-vs-microsoft-tam/
Some of its features include:
- Attack tree generation, which provides a visual representation of threats for a clearer analysis.
- Automatically identify high value targets to ensure necessary security controls are put in place.
- Centralized threat management to manage threats to your application, infrastructure, mobile devices, web services, etc.
- Design and develop secure applications by enforcing secure architecture guidelines and secure coding standards including code snippets for various technologies.
- Enforce secure deployment by providing secure hardening checklists for infrastructure components such as your database servers, web servers, host systems, etc.
Download it at http://www.myappsecurity.com/ThreatModelerSetup.msi