IBM Engineering Requirements Management DOORS

One of the best requirement software I have ever came across. Must give it a shot!

We use Doors as our requirement management software, not too complex but not simple. We're a small company, but our needs cannot be handled by a simple program like Basecamp but we don't want a very expensive one that allows for more capacity than we need. We like the workflow, tagging, visualization and auditing features that come with it. You can track features very easily and other important details, like who is making the changes and how compliant it is with the mail goal and deadline.