Visure - Visure offers a flexible , modern and complete requirements ALM Platform (Application Lifecycle Management).
ReqView - Simple and powerful requirements management tool enabling easy requirements gathering, traceability tracking and offline collaboration.
Accompa - Cloud-based requirements management software tool.
Jama - Jama combines requirement management software with enterprise collaboration capabilities to solve product delivery problems.
Gatherspace - Gatherspace is a full-featured and easy-to-use requirements management software
Polarion REQUIREMENTS - Polarion REQUIREMENTS enables users to gather, author, approve and manage requirements for complex systems across entire project lifecycles.