Products available as OSS.

• 4Suite.org - Open source tools for standards-based XML and object-database development in Python
• Advanced Library Collection Management Environment (ALCME) - set of tools to integrate the components needed to build a distributed library collection management system
• AOLserver - multithreaded, Tcl-enabled web server used for large scale, dynamic web sites
• Apache - the most popular web server on the Internet
• Apple OS X Server - partially open-source
• arch - revision control system with features that are ideal for projects characterized by widely distributed development, concurrent support of multiple releases, and substantial amounts of development on branches
• ArsDigita - builds and distributes the ArsDigita Community System (ACS), an open-source application development platform and suite of enterprise applications
• Berkeley Internet Name Daemon (BIND) - the de-facto standard program for turning host names into IP addresses
• CVS (Concurrent Versions System) - popular version control system for software development
• CVS Bubbles
• DjVuLibre - enhanced version of that code maintained by LizardTech, the producers of DjVu
• Emacs/W3 - web browser, written entirely in Emacs-Lisp
• Everything - system, using a combination of MySQL and Perl, for entering, linking, and retrieving information, specifically designed for building heavily interlinked online communities
• expat - XML parser (written in C)
• fetchmail - remote-mail retrieval and forwarding utility intended to be used over on-demand TCP/IP links (such as SLIP or PPP connections)
• FreeBSD - BSD UNIX operating system for PCs
• GNU C Compiler (GCC) - popular compiler for C, C++ and Objective C
• GnuCash - accounting software with functions similar to proprietary applications like Quicken
• GNU Image Manipulation Program (GIMP) - graphic editor very similar to Adobe Photoshop
• GNU (GNU's not Unix) - started by Richard Stallman in 1983 to develop a complete free Unix-compatible operating system
• GNUstep - object-oriented application development framework and tool set for use on a wide variety of computer platforms, based on the original OpenStep specification provided by NeXT, Inc. (now Apple)
• Greenstone - for serving digital library collections and building new collections
• KOffice
• Konquerer - application for the K Desktop Environment (KDE) that serves as a file manager, Web browser and document viewer for a wide variety of file formats
• MARC.pm - MAchine Readable Cataloging Perl Module - Perl 5 library for reading, manipulating, outputting and converting bibliographic records in the MARC format
• Minoru Development - OSS development and management consulting for healthcare
• Mozilla - a group within Netscape that acts as a clearing-house for those working on the recently (3-31-98) released Communicator source code. Netscape also plans to use the name Mozilla to refer to the family of web browsers derived from the Netscape source code
• NEdit - multi-purpose text editor for the X Window System
• NetBSD - UNIX-like operating system
• OCLC Office of Research Software - open source software written in the java language free of charge for the benefit of the library community
• OpenBSD - multi-platform 4.4BSD-based UNIX-like operating system
• OpenOffice - open-source project through which Sun Microsystems has released the technology for the StarOffice suite
• OpenSource Directory - primary mission is to provide a resource for users to find Open-Source applications that are stable
• Walt Disney Internet Group
• Pagetool - designed to allow people with limited technical skills to modify and contribute to an organization's web site via a web browser, specifically to help nonprofit organizations with small to medium sized web site and limited technical expertise
• Perl - a popular scripting language interpreter
• PHP-Nuke - software platform for building interactive, database-driven news sites
• PostgreSQL - object-relational database management system (DBMS)
• Python - an interpreted, interactive, object-oriented programming language
• QuickTime Streaming Server - part of Apple's Darwin code
• Samba - protocol for sharing files and printers across platforms
• SATAN - network security analysis tool
• Sendmail - internet mail relay application installed on more than 75% of Internet mail servers
• SLAPD - LDAP-based directory service
• Slashcode - database and other software used to create the Slashdot news site/forum and since used for the development of many other sites
• Tcl - a scripting language
• Vi IMproved (VIM) - improved version of the editor "vi", one of the standard text editors on UNIX systems
• The Web Information Gateway (TWIG) - intranet/groupware tool and application framework, written and implemented in PHP
• Xalan-Java - Apache Project's XSLT processor
• XFree86 - implementation of X Windows
• Z Object Publishing Environment (Zope) - Digital Creations - platform for creating dynamic Web sites and Web applications
• Zope - a Swiss Army Knife for the Web? - Paul Browning, Ariadne, 24 September 2000