ReqSheet enables offline creation and editing of requirements. The tool manages a simple, lightweight requirements hierarchy and can be synchronized with TFS. The requirements “documents” can be emailed, shared via Sharepoint and more. Along with their storyboarding product, Reqsheet creates a great solution for requirements elicitation with TFS.
Check out more at the stpSoft web site: http://www.stpsoft.co.uk/vsts/