ReqView - Simple and powerful requirements management tool enabling easy requirements gathering, traceability tracking and offline collaboration.
Jama Connect - The Leader in Requirements Management Solutions
Cradle - 3SL Cradle is a requirements management and systems engineering software tool.
Tisym - Helpdesk system, issue tracking system, trouble tickets and customers requirements management system.
Modern Requirements Suite4TFS - Modern Requirements Suite4TFS is an innovative, efficient and collaborative requirements management tool.
Serena Dimensions RM - Serena Dimensions RM is a web application to improve the definition and management of requirements across the product lifecycle.