My Visual Database - Using My Visual Database, you can create databases for invoicing, inventory, CRM, or any specific purpose.
LibreOffice - Base - Base, database, database frontend, LibreOffice, ODF, Open Standards, SQL, ODBC
Grubba.net - The free web based online database for home and office.
StratusBase - StratusBase is an application designed to take the hassle out of building an online database.
MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.
Symphytum - Symphytum Project