Bug Keeper - description from Softdepia.com:
Keeping track of the bug and feature request from your clients can be a nightmare. Why not let Advanced Bughound show you the way? Keeping track of your bugs, features and clients becomes a snap with Advanced Bughound. We designed Advanced Bughound to be user friendly and very easy to use. People using Advanced Bughound will feel right at home after minutes of use. While it is easy to use, it was designed to be very powerful. Advanced Bughound takes only minutes to install and is even easier to setup with multiple users.
Bug Keeper is a "Free to try" program. You can download and try it for an evaluation period.