Resolver One - Resolver One is a program that blends a familiar spreadsheet-like interface with the powerful...
LibreOffice - Base - Base, database, database frontend, LibreOffice, ODF, Open Standards, SQL, ODBC
FlexiSheet - FlexiSheet is a multi-dimensional spreadsheet in the spirit of Lotus Improv.
My Visual Database - Using My Visual Database, you can create databases for invoicing, inventory, CRM, or any specific purpose.
XCubes - Multidimensional spreadsheet for financial simulation, planning, reporting, marketing analysis etc.
MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.