LibreOffice - Base - Base, database, database frontend, LibreOffice, ODF, Open Standards, SQL, ODBC
Microsoft Office Access - Access is now much more than a way to create desktop databases. It’s an easy-to-use tool for quickly creating browser-based database applications.
My Visual Database - Using My Visual Database, you can create databases for invoicing, inventory, CRM, or any specific purpose.
MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.
Runabase - Simple, powerful and flexible tool for creating databases and accounting programs.
CouchBase - Document-Oriented NoSQL Database