DataCat offers a cOMPLETELY customizable database utility- including an "item" database and a user database...users can add, modify, and remove their listings (if you choose to let them). System can be used for classifieds, link directories, real estate listings, news archives, etc. Apperance, layout, data fields, and search/list options are totally customizable.
This program displays a DBM database as a table, and provides auto-sized forms to add or edit records. You can edit your existing DBM files or create new ones.