This is a list of proprietary source-available software, which has available source code, but is not classified as free software or open-source software. In some cases, this type of software is originally sold and released without the source code, and the source code becomes available later. Sometimes, the source code is released under a liberal software license at its end of life. This type of software can also have its source code leaked or reverse engineered.

While such software often later becomes open source software or public domain, other constructs and software licenses exist, for instance shared source or creative commons licenses.Shared Source, Eventual Source, and Other Licensing Models – Alternatives to Open Source , by Lawrence Rosen (2004)CHAPTER 5 Non-Open Source Licenses , Understanding Open Source and Free Software Licensing – By Andrew M. St. Laurent, August 2004 If the source code is given out without specified license or public domain waiver it has legally to be considered as still proprietary due to the Berne Convention.

For a list of video game software with available source code, see List of commercial video games with available source code. For specifically formerly proprietary software which is now free software, see List of formerly proprietary software.

Title Original author Original release Source code availability OpenSource compatible Freeware (data and software) Complete Free software (DFSG compatible) New license Notes Amazon Lumberyard Amazon 2002 2016 proprietary license On 16 August 2017, the source code of the game engine was made freely available under proprietary license terms via GitHub.Lumberyard & Amazon GameLift: Now Available – Lumberyard on GitHub by Todd Gilbertsen on 15 August 2017license on github.com/aws/Lumberyard Apple DOS Apple Inc. 1986 2015 non-commercial license The Apple DOS source code was released by the Computer History Museum after Paul Laughton, the creator of the code, donated it. Photoshop 1.0.1Adobe Systems Inc. 1990 February 2013 ? Computer History Museum Software License (non-commercial license) Adobe Systems Inc. made the source code of the 1990 version 1.0.1 of Photoshop available to the Computer History Museum. Includes all the code with the exception of the MacApp applications library which was licensed from Apple. Bitstream Vera (font) Bitstream Inc. Unknown 2003 ? (non-commercial) (can't be sold by itself) custom non-commercial Through the efforts of Bitstream and the GNOME Foundation Build Ken Silverman 1995 2000 own non-commercial license Commodore 64 firmware Commodore International 1982 2012 Around 2012 Dennis Jarvis, ex-Commodore engineer, made material and source code of the development history of the C64 available.Dennis Jarvis Page on 6502.org Later the source code was cleaned up, reformated and made build-able again in a GitHub projects by enthusiasts.c64rom on github.com/mist64 Call to Power II Activision 2000 2003 own non-commercial license Source code was handed to the community to allow them self-support. CuneiForm Cognitive Technologies 1993 2008 ? ? ? BSD Optical character recognition software Deluxe Paint I (1986) Electronic Arts 1996 2015 non-commercial license Source code of an early version released by Electronic Arts in 2015. Duke Nukem 3D 3D Realms 1996 2003 GPL-2.0-or-later Game code only, no data, no engine. Doom id Software 1993 1997 id software license/later GPLv2+ Code only. Originally released under a restrictive license in 1997, in 1999 re-licensed under GPL-2.0-or-later. DR-DOS/Caldera OpenDOS 7.01 Caldera (company) 1976 May 1997 ? ? ? Caldera's OpenDOS End-User License Agreementlicense.txt The Caldera OpenDOS 7.01 source code was a base for the DR-DOS/OpenDOS Enhancement Project in 2002.Welcome to the DR-DOS/OpenDOS Enhancement Project! on drdosprojects.de Furby David Hampton 1998 August 2018 ? ? ? Public Domain (?) In August 2018, after contacting the US patent office, a PDF scan of the toy's assembler language firmware from the patent's appendix became available on the internet.take-a-look-inside-the-furbys-source-code on thenextweb.com (2018-08-13)furbysource.pdf on seanriddle.com Later it was archived by the Internet Archive,furby-source on the Internet Archive and then manually corrected and transcribed to assemble-able code again by an enthusiast.furby-source on GitHub FPS Creator Classic The Game Creators 1999 (?) February 2016 undefined In February 2016 authors decided to release "FPS Creator" as "FPS Creator Classic" source available (no defined license) with many model packs on github.com.FPS Creator Classic Open Source on thegamecreators.comFPS-Creator-Classic on github.com/LeeBamberTGC Helix (multimedia project)ZDNet UK (5 December 2002) RealNetworks opens more Helix DNA , Retrieved on 2 August 2009ZDNet UK (6 August 2003) RealNetworks releases player code for Linux , Retrieved on 2 August 2009 RealNetworks2002 ? RealNetworks Community Source License The Helix Community is an open collaborative effort to develop and extend the Helix DNA platform.Helix Community , Retrieved on 5 August 2009 HoverRace GrokkSoft 1996 2006 ? originally time limited license / later non-commercial GrokkSoft HoverRace SourceCode License. Jump 'n Bump Brainchild Design 1998 1999 ? EmailwareJump 'n Bump readme.txt JUMP 'N BUMP by Brainchild Design in 1998 Jump 'n Bump is e-mailware. That means you're supposed to send us an e-mail. Write for example where you're from and what you thought about this game. If you do that, you will greatly encourage us to make more games for you! Source code released under an emailware license. Java Sun Microsystems 1995 1998 Sun Community Source LicenseIn 1998 Sun Microsystems released much of Java under the terms of the Sun Community Source License. MacPaint Apple Inc. 1984 2010 non-commercial license MacPaint 1.3's source code (written in a combination of Assembly and Pascal) is available through the Computer History Museum, along with the QuickDraw source code. Marathon 2: Durandal Bungie 1995 2000 GPL-3.0-or-later The code was released under the GPL-2.0-or-later, then GPL-3.0-or-later, while the data is still proprietary. Now known as Aleph One Mega (service) Mega Limited 201? 2017 MEGA Limited Code Review License Mega Limited released the source code to their client-side software around 28 January 2017 under an own license on github.com.MEGA source code on hackernews.commeganz on github.com MS-DOS 1.25 and 2.0 Microsoft19822018 MITOn 25 March 2014 Microsoft made the code to MS-DOS 1.25 and 2.0 available to the public under a Microsoft Research License for educational purposes.TechNet Blogs, Microsoft makes source code for MS-DOS and Word for Windows available to public , Retrieved 25 March 2014. In 2018 they relicensed them under MIT license. Microsoft Word for Windows version 1.1a Microsoft 1991 2014 Microsoft Research License (non-commercial license)Microsoft made the source code of the 1991 version of Word available to the Computer History Museum and to the public for educational purposes. MidasWWW Tony Johnson and Chung Huynh 1992 2015 ? ? unspecified 16 November 1992 sources were made available in June 2015 at GitHub without specified license.midasWWW at github NASTRAN NASA 1960 2001 ? ? ? own license In 2001 the NASA released with the "NASA Classics" package also the Finite Element Analysis simulator's source code to the public for free.NASA Releases Classic Software To Public Domain on newsbytes.com by Susan M (25 October 2001)nasa-releases-classic-software-to-public-domain on slashdot.com (2001)NTTC, OSC Celebrate Space Agency's Birthday, Launch "NASA CLASSICS" Software Apps to Commercial Markets on openchannelsoftware.com (2001) NCSA Mosaic 2.7 NCSA 1993 March 2010Browse the Web as it Looked in 1993 By Michael Calore ? ? own license first graphical browser NetBeans 1997 October 2007 Apache-2.0 An integrated development environment (IDE) for Java and other programming languages Netscape Enterprise ServerSun Microsystems January 2009 ? ? BSD Sun Microsystems open sourced it.PhysXNvidia20042015 3-clause BSD license (Proprietary until 2018 except for Xbox One, PlayStation 4, and Nintendo Switch)At GDC 2015, Nvidia made the PhysX' source code available on GitHub, but requires registration on developer.nvidia.com and EULA signing.