DaDaBIK is a very popular and mature Open Source PHP application which allows you to easily create a highly customizable database front-end/application without coding. You can use it to create in a few minutes a very basic CRUD (create, read, update, delete) database front-end or to develop a more sophisticated database application.
Xataface is a flexible and shapable skin that sits on top of MySQL, making it accessible to every-day users. It automatically generates the appropriate forms, lists, and menus for a user to interact with the database without having to know any SQL.
It is a full-featured Web application framework, and gives developers the flexibility to customize the features and behavior of their application via configuration files (using the simple INI-file syntax), templates, and plug-ins. A generic application with no customizations is completely functional, but the developer is free to customize things at his leisure.