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[3893 users on Ohloh]
MySQL, the most popular Open Source SQL database management system, is developed, distributed, and supported by Sun Microsystems.
PostgreSQL Database Server
[1046 users on Ohloh]
PostgreSQL is a powerful, open source relational database system. It has more than 15 years of active development and a proven architecture that has earned it a strong reputation for reliability, data integrity, and correctness. It runs on all major operating systems, including Linux, UNIX (AIX, BSD, HP-UX, SGI IRIX, Mac OS X, Solaris, Tru64), and Windows.
[696 users on Ohloh]
SQLite is a small C library that implements a self-contained, embeddable, zero-configuration SQL database engine. Implements most of SQL92 and ACID (atomic, consistent, isolated, and durable) transactions; no setup or administration needed.
[406 users on Ohloh]
NHibernate is a port of Hibernate Core for Java to the .NET Framework. It handles persisting plain .NET objects to and from an underlying relational database. Given an XML description of your entities and relationships, NHibernate automatically generates SQL for loading and storing the objects. Optionally, you can describe your mapping metadata with attributes in your source code.
[180 users on Ohloh]
The DBI module enables your Perl applications to access multiple database types transparently. You can connect to a large number of databases, including MySQL, MSSQL, Oracle, Informix, Sybase, ODBC etc. without having to know the different underlying interfaces of each. The API defined by DBI will work on all these database types and many more.
HSQL Database Engine
[173 users on Ohloh]
hsqldb is a relational database engine written in Java with a JDBC driver that supports a subset of ANSI SQL:1999. It offers a small, fast database engine. Embedded and server modes are available. It includes tools such as a minimal Web server, in-memory query and management tools (which can be run as applets or servlets, too), a test framework, PHP compatibility, Eclipse and NetBeans IDE compatibility, and a number of demonstration examples.
[83 users on Ohloh]
PostGIS is a spatial database extension for PostgreSQL. PostGIS complies with the OpenGIS "Simple Features for SQL" specification, and provides high-performance spatial SQL access to GIS objects in the database.
[78 users on Ohloh]
KOffice is a free, integrated office suite for KDE, the K Desktop Environment. KOffice applications uses OpenDocument as their native file format when possible. The suite is released separately from KDE.

The KOffice suite includes the following applications:
- KWord - A frame-based word processor
- KSpread - A powerful spreadsheet application
- KPresenter - A full-featured presentation program
- Kexi - An environment for creating data...

Apache Derby
[75 users on Ohloh]
Apache Derby, an Apache DB subproject, is a relational database implemented entirely in Java. Some key advantages include a small footprint ( about 2 megabytes for the base engine and embedded JDBC driver) and being based on the Java, JDBC, and SQL standards.

Derby provides an embedded JDBC driver that lets you embed Derby in any Java-based solution. It also supports the more familiar client/server mode with the Derby Network Client JDBC driver and Derby Network Server. Derby is easy to in...

[54 users on Ohloh]
phpPgAdmin is a fully functional PHP-based administration package for PostgreSQL. It has all the basic functionality you need to completely administer a PosgreSQL server and/or database, including the ability to administer views, sequences, stored procedures, and triggers. Features include the ability to create and drop databases; create, copy, drop, and alter tables/views/sequences/functions/triggers; edit and add fields (to the extent Postgres allows); execute any SQL-statement, even batch-que...
SQuirreL SQL Client
[53 users on Ohloh]
SQuirreL SQL Client is a graphical SQL client written in Java that will allow you to view the structure of a JDBC compliant database, browse the data in tables, issue SQL commands etc.
[52 users on Ohloh]
An extensible object relational mapper for Perl.
[51 users on Ohloh]
Firebird is a relational database offering many ANSI SQL standard features that runs on Linux, Windows, and a variety of Unix platforms. Firebird offers excellent concurrency, high performance, and powerful language support for stored procedures and triggers. It has been used in production systems, under a variety of names, since 1981.

Firebird is a commercially independent project of C and C++ programmers, technical advisors and supporters developing and enhancing a multi-platform relatio...

[48 users on Ohloh]
SPIP est un Système de Publication pour l'Internet. Kesako ? Il s'agit d'un ensemble de fichiers, installés sur votre compte Web, qui vous permettent de bénéficier d'un certain nombre d'automatismes : gérer un site à plusieurs, mettre en page vos articles sans avoir à taper de HTML, modifier très facilement la structure de votre site... Avec le même logiciel qui sert à visiter un site (Netscape, Microsoft Explorer, Mozilla, Opera...), SPIP permet de fabriquer et de tenir un site à jour, grâce à ...
[38 users on Ohloh]
Horde is both an Open Source software project and an application framework written in PHP.
The application framework is currently the basis for 50 applications written by developers from around the world, including the flagship IMP Webmail client, the popular Chora repository viewer, and a complete groupware suite. The guiding principles of the Horde Project are to create solid standard-based applications using intelligent object oriented design, and wide-ranging platform and backe...
H2 Database Engine
[37 users on Ohloh]
H2 is an SQL database engine written in Java. It is very fast and small (about 1 MB), and supports embedded, server, and clustering modes. A browser based console application is included. Disk based and in-memory tables and databases are supported.

Some of its features are transactions isolation, multi-version concurrency (MVCC), table level locking, encrypted databases, fulltext search,
and strong security.

The main API is JDBC, however ODBC and others are also suppo...

[30 users on Ohloh]
A powerful MySQL client for Win32.
Metasploit Framework
[26 users on Ohloh]
The Metasploit Framework is a development platform for creating security tools and exploits. The framework is used by network security professionals to perform penetration tests, system administrators to verify patch installations, product vendors to perform regression testing, and security researchers world-wide. The framework is written in the Ruby programming language and includes components written in C and assembler.
[26 users on Ohloh]
monotone is a free distributed version control system. It provides a simple, single-file transactional version store, with fully disconnected operation and an efficient peer-to-peer synchronization protocol. It understands history-sensitive merging, lightweight branches, integrated code review and 3rd party testing. It uses cryptographic version naming and client-side RSA certificates.

It has good internationalization support, has no external dependencies, is written in C++, runs on Linux...

Ingres Database
[25 users on Ohloh]
Ingres Database is the open source database management system that can reduce IT costs and time to value while providing the strength and features expected from an enterprise class database. Ingres Database is a leader in supporting business critical applications and helping manage the most demanding enterprise applications of Fortune 500 companies. Focused on reliability, security, scalability, and ease of use, Ingres contains features demanded by the enterprise while providing the flexibility ...