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.
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.
FileMaker Pro - FileMaker Pro Advanced includes all the features of FileMaker Pro plus a set of advanced tools so you can rapidly build powerful custom apps.
Symphytum - Symphytum Project