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.
EagleData - Freeware database for Mac
Runabase - Simple, powerful and flexible tool for creating databases and accounting programs.
Kexi - Kexi | Calligra Suite
PortaBase - PortaBase (portable database) is a program for conveniently managing one-table database files.