Squarebase is a Web-based interface for MySQL databases. The basic idea is that it builds a database (called the "metabase") that describes the structure of the database. The information in the metabase is used to format lists and forms for browsing and editing the contents of the database.
SynApp2 is a development tool that generates database-backed Web applications by processing your MySQL or Oracle schema definition and producing the Web pages used to manage your data. It does more than an admin tool or file manager by considering table relations as a cohesive whole that drives the generation of a complete application that smoothly integrates your entire database design, complete with PDF reports. It is open, compact, efficient, and compatible with the tools and technologies you’re using now.
Xataface Email Module allows you to email to the results of any set found in a Xataface application. This allows you to easily convert your existing database of contacts into a mailing list. It supports HTML email, recipient opt-out, mailmerge macros, and more. The email is sent in the background via a cron script, so arbitrarily large email lists can be supported.
Mescaline is a PHP Web application and framework that makes data stored in databases available to users. The interfaces for viewing and editing the data are created without requiring any coding or config file editing using a wizard. It works with unconventional databases and can be easily extended and reused, since it is written in object-oriented PHP.
DBKiss is a one-PHP-file database browser that is easy to upload and use. It supports MySQL and PostgreSQL and features import/export of data, searching of the whole database or single tables, an advanced SQL editor, saving of templates, multi-query execution with pagination, and more.