Enterprise Architect

Enterprise Architect is a requirement management tool. It integrates seamlessly with other development tools by creating requirements in the model.

Features:
1. Allows to build robust and maintainable systems
2. It loads extremely large models in seconds
3. Collaborate effectively globally
4. Offers complete traceability
5. Improve business outcomes
6. Model and manage complex Data effectively
7. Supports Single click HTML and document generation
8. Code execution to visual diagrams

More Information and Official Website:
Download : http://www.sparxsystems.com/products/ea/