nuBuilder Forte - Low-code, open-source RAD development tool for creating web-based database applications.
LibreOffice - Base - Base, database, database frontend, LibreOffice, ODF, Open Standards, SQL, ODBC
My Visual Database - Using My Visual Database, you can create databases for invoicing, inventory, CRM, or any specific purpose.
PHPmaker - PHPMaker is a powerful automation tool that can generate a full set of PHP quickly from MySQL, PostgreSQL, Oracle, Microsoft Access, Microsoft SQL Server and SQLite databases.
MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.
Xataface - Xataface is an open source PHP framework for building PHP/MySQL applications in less time that with fewer lines of code that do more.