This is a RAD (Rapid Application Development) tool to build PHP applications. When you have a relational database in place and you want to build an application from scratch around it, then this tool comes in handy. It reads the database structure and, if done well, it will build a fully maintainable website around it that lets you manage the contents of the database. Very usefull for intranet applications. But you can also use it for extranet usage. You can set a user database with logins and passwords to allow users to identify themselves before they start changing or updating data. Youcan use MySQL, MS Access, MS SQL Server and Oracle database.