Information Systems Requirements Engineering Tools - what is their availability and usage?

I would like to ask if you know other requirements collection/engineering tools than Accept 360 Active!Focus Analyst Pro Caliber RM C.A.R.E. Catalyze CORE Cradle DOORS Enterprise Architect GatherSpace GMARC Easy-RM IRqA Jama Contour JEREMIA Leap SE Lighthouse RM Mac A&D and Win A&D MKS Requirements objectiF Open Source RM Optimal Trace PACE PixRef Pro Projectricity Qualica QFD Rally RaQuest Reconcile Reqtify Requirements Mgmt Database Requirement Tracing System ...