List of formerly proprietary software
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In some cases, the company continues to publish proprietary releases alongside the non-proprietary version.
|Title||Original release||Relicensed release||Initial free relicense||Notes|
|Adobe Flex||2004||2007||MPL||Since renamed to Apache Flex and changed to Apache License 2.0|
|AdvFS||1990s||2008||GPL v2||HP opened up AdvFS from Tru64 UNIX.|
|AOLserver||1999||GPL / modified MPL|||
|Apache Derby||1996||2004||Apache License 2.0||Relational database management system originally called Cloudscape; released as free and open-source software by IBM in 2004 and donated to the Apache Software Foundation|
|Apache Wave||2009||2009||Apache License||Formerly Google Wave.|
|Astrolog||1991||2015||GPL v2+ / custom permissive||Has always been freeware and open source, but had a custom attribution demanding permissive license.|
|BDS C Compiler||1979||2002||Public domain||Released by author|
|Bitstream Vera (font)||2003||custom||Through the efforts of Bitstream and the GNOME Foundation|
|BlitzBASIC (Blitz3D, BlitzPlus, BlitzMax)||2001||2014||zlib license||BlitzPlus was released as Open Source on 28 April 2014 under the zlib license on github.com. Blitz3D follow on 3 August 2014. BlitzMax was open sourced on 21 September 2015.|
|Catacomb II||1991||2014||GPL v2|||
|Catacomb Abyss||1992||2014||GPL v2|||
|Catacomb Armageddon||1992||2014||GPL v2|||
|Catacomb 3D||1991||2014||GPL v2|||
|ChakraCore||2009||2016||MIT||On 13 January 2016 Microsoft released ChakraCore under the MIT license on GitHub. ChakraCore is essentially the same as the Chakra engine that powers the Microsoft Edge browser, but with platform-agnostic bindings, i.e. without the specific interfaces utilised within the Windows Universal App platform.|
|Coherent||1980||2015||3-clause BSD License|||
|CP/M family||1974||1997, 2001, 2014|||
|CuneiForm||1993||2008||BSD||Optical character recognition software|
|Dink Smallwood||1998||2003||zlib-like||Some game data (e.g. sounds) not released under a free license.|
|Doom engine||1993||1999||GPL||Code only. Originally released under a restrictive license in 1997|
|DOS.MASTER||end 1980s||2000||public domain software||DOS.MASTER is a program for Apple II computers which allows Apple DOS 3.3 programs to be placed on a hard drive or 3.5-inch floppy disk and run from ProDOS. Written by Glen Bredon as a commercial program during the late 1980s, it was released into the public domain by his family after the author's death.|
|Duke Nukem 3D||1996||2003||GPL||Game code only, no data, no engine.|
|Etherpad||2008||2009||Apache License 2.0||Open sourced after being purchased by Google|
|FAR Manager||1996||2007||BSD||Version 2.0 released as open source.|
|File Manager (Windows)||1990||April 2018||MIT||On 6 April 2018, Microsoft released binaries and the source code, licensed under the MIT License, for an improved version of File Manager able to be run on Windows 10. This version included changes such as the ability to compile in modern versions of Visual Studio, the ability to compile as a 64-bit application, and numerous usability improvements.|
|Free Download Manager (FDM)||2003||2007||GPL||Free since version 2.5|
|FoundationDB||2013||2018||Apache License 2.0||Apple Inc. acquired the founding company in March 2015 and discontinued downloads of the software. In April 2018, Apple open-sourced the database and resumed downloads.|
|Ghostery||2010||2018||Mozilla Public License 2.0||Cliqz GmbH acquired Ghostery from Evidon, Inc. in February 2017. Ghostery's software was open-sourced on 8 March 2018.|
|GEM family||1985||1999||GPL||Development continued as OpenGEM and FreeGEM.|
|Gentium (font)||2002||2005||OFL||Through the efforts of SIL International|
|Gigablast||2000||2013||Apache License 2.0|||
|Glitch||2011||2013||Public domain software (CC0)||After Glitch was officially shut down on 9 December 2012, the artwork and most of the source code was released under the public domain-like Creative Commons license CC0 on 18 November 2013. On 9 December 2014, a fan project to relaunch Glitch under the name Eleven began alpha testing.|
|GLX||1990s||2008||SGI FreeB License|||
|Hovertank 3D||1991||2014||GPL v2|||
|ILWIS||1988||2007||GPL||Released as free and open-source software by ITC|
|id Tech 2||1997||2001||GPL|
|id Tech 3||1999||2005||GPL|
|id Tech 4||2004||2011||GPL||The released version is the source code to Doom 3; source code to newer id Tech 4 games has yet to be released. Changes to the code had to be made to avoid use of the patented Carmack's Reverse.|
|JaikuEngine||2006||2009||Apache License 2.0|||
|Java||1995||2006–2007||GPL||On 13 November 2006, Sun Microsystems released much of Java as free software under the terms of the GNU General Public License (GPL). On 8 May 2007 Sun finished the process, making all of Java's core code free and open-source, aside from a small portion of code to which Sun did not hold the copyright.|
|Jumper 2.0||2007||2008||GPL||Publicly announced on 29 September 2008,|
|Korn shell||1982||2000||custom; now CPL|
|LightZone||2005||2012||3-clause BSD||Company went out of business|
|Marathon 2: Durandal||1995||2000||GPL||Only the code was released under the GPL. Now known as Aleph One|
|MiniPanzer and MegaPanzer||GPL||The source code of the programs was released as GPL in 2009 by their author, who retained the copyright.|
|Movable Type||2001||2007||GPL||Weblog software|
|MP/M family||1979||1997, 2001|||
|.NET Framework (most components)||2002||2014||MIT License, Apache license 2.0, BSD license||Starting in 2014 Microsoft released most of their .NET ecosystem software (.NET Micro Framework, .NET Compiler Platform, ASP.NET, Entity Framework, NuGet etc.) under FOSS licenses and shifted the code to a GitHub repository.|
|NetBeans||1997||2007||GPL, CDDL||An integrated development environment (IDE) for Java and other programming languages|
|Netscape Enterprise Server||2009||BSD||Sun Microsystems open sourced it.|
|Netscape Navigator/Communicator||1994||1998||MPL||See Mozilla|
|OpenGL sample implementation||1992||2008||SGI FreeB License|||
|Open Sound System||1992||2007||GPL, CDDL|
|OpenWRT||?||2003||GPL||As Linksys built the firmware for their WRT54G wireless router also from GPL'ed code, they were required to make the source code available in July 2003.|
|Performance Co-Pilot||1993||1999||GPL, LGPL|
|PowerShell||2006||August 2016||MIT License||Open sourced by Microsoft in August 2016 on GitHub.|
|Qt||1991||1999||QPL||First released as open source under the QPL. Later released as GPL. Qt 4.5 and later are released under the LGPL. Until 2005 the Windows version was only under proprietary license.|
|Quake engine||1996||1999||GPL||The map sources were also released under the GPL in 2006.|
|RSD Game-Maker||1991||2014||MIT license||After some consultation with the user base, on 12 July 2014 original coder Andy Stone released the Game-Maker 3.0 source code on GitHub, under the MIT license.|
|Rebol||1997||2012||Apache license 2.0||Following the discussion with Lawrence Rosen, the Rebol version 3 interpreter was released under the Apache 2.0 license on 12 December 2012.|
|Rise of the Triad||1994||2002||GPL||Only the code was released under the GPL.|
|Second Life client||2003||2007||GPL v2|
|SimCity||1989||2007||GPL v3||Free version released as 'Micropolis' |
|Solaris||1989||2005||CDDL||Free version released as OpenSolaris|
|Source Code Control System||1972||2006||CDDL|
|StarOffice||1986||2000||LGPL/SISSL||Free version released as OpenOffice.org, later released only under the LGPL. (OpenOffice.org was discontinued in 2011, but forks—most prominently LibreOffice (licensed under the LGPL) and Apache OpenOffice (licensed under the Apache License)—have become its dominant successors.) StarOffice was still released separately under a proprietary license, using mostly the same code, until its discontinuing in 2011; Sun required all contributors to the main OpenOffice.org project assign joint copyright to Sun.|
|Star Ruler 2||2015||2018||MIT / CC BY-NC||Source code and assets re-released to the public (except for music, which is kept prorietary). The assets are under non-free CC BY-NC license.|
|Synfig||2001||2005||GPL||Some more information is available on the Synfig history page.|
|Tesseract OCR||1985||2005||Apache License 2.0||Released as free and open-source software by HP and UNLV|
|TextSecure||2010||2011||GPLv3||Since renamed to Signal|
|Torque 3D||2001||2012||MIT License||Developed for Tribes 2. Released as free and open-source software by Dynamix|
|Visual Studio Code||2015||2015||MIT|
|Warzone 2100||1999||2004||GPL||Video game by Eidos Interactive|
|Watcom C compiler||1988||2003||Sybase Open Watcom Public License||Free version released as Open Watcom under a license which is considered non-free by the GNU project but acceptable by the OSI.|
|Windows Calculator||1985||2019||MIT License||Windows 1.0, released in November 1985, included the first iteration of Windows Calculator. In March 2019, Microsoft released the source code of Windows Calculator under the MIT License.|
|Windows Console||2019||MIT License||In 2019, the Windows Console infrastructure was open-sourced under the MIT License, alongside Windows Terminal.|
|Windows Live Writer||2012||2015||MIT License||An open source fork of Windows Live Writer was released as Open Live Writer by Microsoft on 9 December 2015.|
|XMind||2007||2008||EPL and LGPL||Mindmapping software based on the Eclipse RCP|
|ZFS||200?||2005||CDDL||Released by Sun Microsystems under an open-source license in 2005. Due to a FSF announced license incompatibility of the GPL with the CDDL ZFS wasn't directly integrated in linux, but in the BSDs or MacOS due to their permissive licensed kernel which offers better license compatibility. After the later owner Oracle didn't released after version 28, the community forked to OpenZFS.|
- History of free and open-source software
- List of commercial video games with available source code
- List of free and open-source software packages
- List of free and open-source web applications
- List of proprietary source-available software
- "Archived copy". Archived from the original on 2016-03-03. Retrieved 2014-06-09.CS1 maint: archived copy as title (link)
- "Archived copy". Archived from the original on 2016-06-28. Retrieved 2017-06-14.CS1 maint: archived copy as title (link)
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- BlitzPlus Source Code Released Archived 2016-07-16 at the Wayback Machine by simonh (2014-04-29)
- Blitz3D open sourced! Archived 2016-09-06 at the Wayback Machine on Blitz3D Forums by (2014)
- Blitz3D Now Free and Open Source! Archived 2016-07-16 at the Wayback Machine by simonh (2014-08-03)
- blitz3d Archived 2017-02-22 at the Wayback Machine on github.com
- blitzmax Archived 2017-04-09 at the Wayback Machine on github.com
- "Archived copy". Archived from the original on 2014-06-09. Retrieved 2014-06-06.CS1 maint: archived copy as title (link)
- Holwerda, Thom. "CDE released as open source". OSNews. Archived from the original on 2012-08-08. Retrieved 2012-08-06.
- Lounsbury, Dave. "How the Operating System Got Graphical". The Open Group. Archived from the original on 2012-11-27. Retrieved 2012-09-27.
- "CMU Sphinx Open Sourced". Slashdot.
- "SourceForge: CMU Sphinx Transition to Open Source". 2000-04-22. Archived from the original on 2000-04-22.
- "Coherent UNIX clone goes Open Source". OSNews. 2015-04-02. Archived from the original on 2015-04-04. Retrieved 2015-04-03.
- Olmstead, Tim (1997-08-10). "CP/M Web site needs a host". Newsgroup: comp.os.cpm. Archived from the original on 2017-09-01. Retrieved 2018-09-09.
- Olmstead, Tim (1997-08-29). "ANNOUNCE: Caldera CP/M site is now up". Newsgroup: comp.os.cpm. Archived from the original on 2017-09-01. Retrieved 2018-09-09. 
- "License Agreement". Caldera, Inc. 1997-08-28. Archived from the original on 2018-09-08. Retrieved 2018-11-14.CS1 maint: BOT: original-url status unknown (link)  
- Sparks, Bryan Wayne (2001-10-19). Chaudry, Gabriele "Gaby" (ed.). "License agreement for the CP/M material presented on this site". Lineo, Inc. Archived from the original on 2018-09-08. Retrieved 2018-11-14.
[…] Let this email represent a right to use, distribute, modify, enhance and otherwise make available in a nonexclusive manner the CP/M technology as part of the "Unofficial CP/M Web Site" with its maintainers, developers and community. I further state that as Chairman and CEO of Lineo, Inc. that I have the right to do offer such a license. […] Bryan Sparks […]CS1 maint: BOT: original-url status unknown (link)
- Chaudry, Gabriele "Gaby" (ed.). "The Unofficial CP/M Web Site". Archived from the original on 2016-02-03.
- Gasperson, Tina (2001-11-26). "CP/M collection is back online with an Open Source licence - Walk down memory lane". The Register. Archived from the original on 2017-09-01.
- Swaine, Michael (2004-06-01). "CP/M and DRM". Dr. Dobb's Journal. CMP Media LLC. 29 (6): 71–73. #361. Archived from the original on 2018-09-09. Retrieved 2018-09-09. 
- Laws, David (2014-10-01). "Early Digital Research CP/M Source Code". Computer History Museum. Archived from the original on 2015-07-27. Retrieved 2015-07-25.
- "Dink Smallwood Source License Information". Code Dojo. Archived from the original on 2015-07-18. Retrieved 2015-07-22.
- Public.Domain.notice.txt Archived 2006-02-01 at the Wayback Machine on apple2.org.za
- "MySQL Falcon Storage Engine Open Sourced". Slashdot.
- "'90s kids rejoice! Microsoft releases the original Windows 3.0 File Manager source code – TechCrunch". techcrunch.com.
- Microsoft Corporation. "Microsoft/winfile: Original Windows File Manager (winfile) with enhancements". GitHub. Retrieved 2018-04-07.
- Free Download Manager » Blog Archive » FDM 2.5 is released! Archived 2012-02-09 at the Wayback Machine
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- Lomas, Natasha (2017-02-15). "Private search browser Cliqz buys Ghostery ad-tracker tool". TechCrunch. Retrieved 2019-02-18.
- Matsakis, Louise (2018-03-08). "Ad-Blocker Ghostery Just Went Open Source—And Has a New Business Model". Wired. ISSN 1059-1028. Retrieved 2019-02-18 – via www.wired.com.
- Jemmett, Ben A. L. (April 1999). "Caldera releases GEM under the GPL". Deltasoft - GEM News. Archived from the original on 2016-11-07. Retrieved 2016-11-07.
Caldera Thin Clients, Inc. released the source code for GEM and ViewMAX under the GNU Public License in mid April, following years of speculation over GEM's future. Caldera bought the GEM sources from Novell along with the DR-DOS in 1996, at the time noting that they may develop GEM into a platform for mobile computers and thin clients. However, these plans were dropped, and GEM was instead released into the open-source community.
- Gigablast Inc. "Gigablast Now an Open Source Search Engine". PR Newswire. Retrieved 2019-01-05.
- "A sad announcement from Tiny Speck". Archived from the original on 2013-11-10. Retrieved 2012-12-31.
- tinyspeck (2013-11-18). "Glitch is Dead, Long Live Glitch! - Art & Code from the Game Released into Public Domain". glitchthegame.com. Archived from the original on 2013-12-13. Retrieved 2013-12-11.
The entire library of art assets from the game, has been made freely available, dedicated to the public domain. Code from the game client is included to help developers work with the assets. All of it can be downloaded and used by anyone, for any purpose.
- Blackwell, Laura (2013-11-18). "Afterlife of an MMO: Glitch's offbeat art enters public domain". pcworld.com. Archived from the original on 2013-12-09. Retrieved 2013-12-11.
- "'Two Years Past' or 'Welcome Home'". The Eleven Project. Archived from the original on 2015-01-20. Retrieved 2015-01-11.
- "SGI - Press Releases: SGI Further Opens Its OpenGL Contributions". 2008-12-02. Archived from the original on 2008-12-02.
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- "ICS MotifZone". October 2012. Archived from the original on 2012-10-05. Retrieved 2017-12-06.
- NET Core is Open Source Archived 2016-03-01 at the Wayback Machine on dotnetfoundation.org (November 2014)
- ".NET Core 5". dotnetfoundation.org. .NET Foundation. Archived from the original on 2015-02-17. Retrieved 2015-02-17.
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- "ASP.NET 5". dotnetfoundation.org. .NET Foundation. Archived from the original on 2014-11-23. Retrieved 2015-02-17.
- "ASP.NET MVC, Web API and Web Pages (Razor)". dotnetfoundation.org. .NET Foundation. Archived from the original on 2015-02-17. Retrieved 2015-02-17.
- "ASP.NET Ajax Control Toolkit". dotnetfoundation.org. .NET Foundation. Archived from the original on 2015-02-17. Retrieved 2015-02-17.
- "ASP.NET SignalR". dotnetfoundation.org. .NET Foundation. Archived from the original on 2015-02-17. Retrieved 2015-02-17.
- "Entity Framework 6". dotnetfoundation.org. .NET Foundation. Archived from the original on 2015-02-17. Retrieved 2015-02-17.
- "NuGet". dotnetfoundation.org. .NET Foundation. Archived from the original on 2015-02-17. Retrieved 2015-02-17.
- "Announcing .NET 2015 Preview: A New Era for .NET". .NET Framework Blog. Microsoft. 2014-11-12. Archived from the original on 2015-02-28.
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- "NETSCAPE ANNOUNCES PLANS TO MAKE NEXT-GENERATION COMMUNICATOR SOURCE CODE AVAILABLE FREE ON THE NET". Netscape Communications Corporation. 1998-01-22. Archived from the original on 2007-04-01. Retrieved 2013-08-08.
BOLD MOVE TO HARNESS CREATIVE POWER OF THOUSANDS OF INTERNET DEVELOPERS; COMPANY MAKES NETSCAPE NAVIGATOR AND COMMUNICATOR 4.0 IMMEDIATELY FREE FOR ALL USERS, SEEDING MARKET FOR ENTERPRISE AND NETCENTER BUSINESSES
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[…] The organization that manages open source developers working on the next generation of Netscape's browser and communication software. This event marked a historical milestone for the Internet as Netscape became the first major commercial software company to open its source code, a trend that has since been followed by several other corporations. Since the code was first published on the Internet, thousands of individuals and organizations have downloaded it and made hundreds of contributions to the software. Mozilla.org is now celebrating this one-year anniversary with a party Thursday night in San Francisco.
- Linksys WRT54G and the GPL on lkml (2003-06-07)
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- Microsoft open sources PowerShell; brings it to Linux and OS X Archived 2016-08-18 at the Wayback Machine by Mary Jo Foley on zdnet.com (2016-08-18)
- G. Andrew Stone, "Recreational Software Design's GameMaker product, released in 1994" Archived 2014-09-05 at the Wayback Machine
- "REBOL to become open source". Rebol.com. 2012-09-25. Archived from the original on 2013-12-03. Retrieved 2014-01-23.
- Sassenrath, Carl (2012-12-12). "Comments on: R3 Source Code Released!". rebol.com. Archived from the original on 2014-08-19. Retrieved 2014-08-14.
You probably thought the source release would never happen? Am I right? Well, it's there now in github at github.com/rebol/rebol.
- "Ryzom is free software! What can we do from here?". Free Software Foundation. 2010-05-04. Archived from the original on 2015-07-18.
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Sun's joint effort with CollabNet kicked into high gear on the OpenOffice Web site at 5 a.m. PST this morning with the release of much of the source code for the upcoming 6.0 version of StarOffice. According to Sun, this release of 9 million lines of code under GPL is the beginning of the largest open source software project ever.
- "Star Ruler 2 is now Open Source!". Official discussion boards for Star Ruler 2 on Steam. 2018-07-22. Archived from the original on 2018-07-24. Retrieved 2018-07-24.
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- Microsoft open-sources Live Writer, beloved but abandoned blogging tool Archived 2016-06-12 at the Wayback Machine by Peter Bright on Ars Technica "Opening the app means that it'll get some much-needed maintenance." (2015)
- Sun opens ZFS source code Archived 2016-06-28 at the Wayback Machine on Ars Technica by Ryan Paul (2005-11-17)
- FAQ Archived 2016-01-03 at the Wayback Machine on open-zfs.org