DaDaBIK is a free PHP application that allows you to easily create a highly customizable front-end for a database in order to search, insert, update and delete records; all you need to do is specifying a few configuration parameters.
Starting from version 4.0 alpha DaDaBIK uses the ADOdb Database Abstraction Library in order to support as many DBMS as possible, at the moment it has been tested just with MySQL and PostgreSQL.