GBDI Arboretum is a portable C++ library which implements various Metric Access Method (MAM). By using this library applications will be able to perform similarity queries (queries by contents).

Java library to execute SQL statements stored in external library files. This separation increases readability, eases maintenance, and allows separate testing and documentation. [MIT]

Open-source business template for Filemaker Pro 9.0 that supports sales, inventory, quotes, and taxes, in multiple languages for multiple users.

ChurchInfo is a php/mySQL database to keep track of people, families, groups, pledges and payments, Sunday school classes, etc.

Hamsterdb is written in ANSI C and supports a B+Tree index structure, uses memory mapped I/O (if available), supports cursors, and can create in-memory databases.

A lightweight (Java/J2EE), multiplatform web based query tool and reporting environment. Supports tabular, crosstab, charts, scheduling; data exportable to spreadsheet.

Open source high-performance database system developed at CWI, the Institute for Mathematics and Computer Science Research of The Netherlands.

Both a single user and client/server versions with ODBC drivers. Distributed under a modified GPL that allows distribution of applications without including source code. Commercial support available.

Provides small footprint, high performance, and easy-to-use embedded database solutions. Also sells technical support and consulting.

An integrated environment for managing data. It helps creating database schemas, inserting, querying and processing data. Screenshots, downloads, resources, a wiki and a list of involved developers.