LibreOffice - Base - Base, database, database frontend, LibreOffice, ODF, Open Standards, SQL, ODBC
Wikipedia - Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.
My Visual Database - Using My Visual Database, you can create databases for invoicing, inventory, CRM, or any specific purpose.
Kiwix - Kiwix enables you to have the whole Wikipedia at hand wherever you go!
MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.
Oppia - Oppia is a free, open-source learning platform.