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This is a list of notable software packages which were published as free and open-source software, or into the public domain, but were made proprietary software, or otherwise switched to a license (including source-available licenses) that is not considered to be free and open source.
Title | Orig. free date | License change date | Initial free license | Non-free license | Forked replacement | Notes |
---|---|---|---|---|---|---|
Akka | 2009 | 2022 | Apache-2.0 | Business Source License [1] [2] | ||
ArangoDB | 2011 | 2023 | Apache-2.0 | Business Source License [3] | ||
Aseprite | 2001 | 2016 | GPL-2.0 | EULA that permits personal use but forbids redistribution [4] | LibreSprite | |
CockroachDB | 2015 | 2019 | Apache-2.0 | Business Source License [5] | ||
Consul | 2014 | 2023 [6] | MPL-2.0 | Business Source License [6] | ||
Couchbase Server | 2010 | 2021 | Apache-2.0 | Business Source License [7] | ||
Couchbase Mobile | 2022 [8] | Apache-2.0 | Business Source License [8] | |||
Elasticsearch | 2010 | 2021 | Apache-2.0 | "Elastic License" and Server Side Public License [9] [10] [11] | OpenSearch | Added AGPL v3.0 on 29 August 2024 [12] |
Emby | 2014 | 2018 | GPL-2.0 | Source code closed on December 8, 2018. [13] | Jellyfin | |
FBReader | 2013 | 2015 | GPL-2.0-or-later | Apparently the number of devs was limited, and they all agreed to relicense it.[ citation needed ] | ||
LiveCode | 2013 | 2021 [14] | GPL-3.0-only | proprietary [14] | The Livecode company developed it, ran a Kickstarter campaign to GPL it, ran it for eight years open source, and then relicensed it back to proprietary, saying there were few other contributors, most were using the free GPL version, and they couldn't sustain the project. [14] | |
LiveJournal | 1999 | 2014 | GPL-2.0-or-later | The source code was made private in 2014. | Dreamwidth | |
MetaMask | 2016 | 2020 | MIT | Custom proprietary "non-commercial use only" license. [15] | ||
MongoDB | 2009 | 2018 | AGPL-3.0-only | Server Side Public License [16] [17] | ||
Nexuiz | 2005 | 2012 | GPL-2.0-or-later | Game abandoned in favour of a commercial video game of the same name, which licensed the Nexuiz title but is not based on its engine. | Xonotic [18] | |
OctoberCMS | 2014 | 2021 | MIT | Cited the sustainability of its open source model as a factor. [19] | Winter [20] [21] | |
OTRS | 2001 | 2020 | GPL-3.0-or-later | Support for the Community Edition dropped on December 23, 2020, [22] | Znuny | |
Paint.NET | 2004 | 2007 | MIT | freeware license that prohibits modification or resale [23] | ||
PyMOL | 2000 | 2010 | MIT-CMU [24] | [25] [26] [27] [28] | ||
2008 | 2017 | CPAL-1.0 | Source code was made private in 2017, as the internal codebase had already diverged significantly from the public one. | |||
Redis | 2009 | 2024 | BSD-3-Clause | dual: custom license and Server Side Public License [29] | Valkey [30] | |
Sourcegraph | 2013 | 2023 | Apache-2.0 | proprietary [31] | ||
Terraform | 2014 | 2023 [6] | MPL-2.0 | Business Source License [6] | OpenTofu [32] | HashiCorp founder considered the move "tragic for open source innovation." [33] |
Tux Racer | 2000 | 2002 | GPL-2.0-or-later | Commercial expansion by original authors, also called Tux Racer. | Extreme Tux Racer (formerly PlanetPenguin Racer) | |
Vagrant | 2010 | 2023 [6] | MIT | Business Source License [6] |
The Apache HTTP Server is a free and open-source cross-platform web server software, released under the terms of Apache License 2.0. It is developed and maintained by a community of developers under the auspices of the Apache Software Foundation.
The free software movement is a social movement with the goal of obtaining and guaranteeing certain freedoms for software users, namely the freedoms to run, study, modify, and share copies of software. Software which meets these requirements, The Four Essential Freedoms of Free Software, is termed free software.
Free and open-source software (FOSS) is software that is available under a license that grants the right to use, modify, and distribute the software, modified or not, to everyone free of charge. The public availability of the source code is, therefore, a necessary but not sufficient condition. FOSS is an inclusive umbrella term for free software and open-source software. FOSS is in contrast to proprietary software, where the software is under restrictive copyright or licensing and the source code is hidden from the users.
PyMOL is a source-available molecular visualization system created by Warren Lyford DeLano. It was commercialized initially by DeLano Scientific LLC, which was a private software company dedicated to creating useful tools that become universally accessible to scientific and educational communities. It is currently commercialized by Schrödinger, Inc. As the original software license was a permissive licence, they were able to remove it; new versions are no longer released under the Python license, but under a custom license, and some of the source code is no longer released. PyMOL can produce high-quality 3D images of small molecules and biological macromolecules, such as proteins. PyMOL is widely used.
The Linux Foundation (LF) is a non-profit organization established in 2000 to support Linux development and open-source software projects.
A Contributor License Agreement (CLA) defines the terms under which intellectual property has been contributed to a company/project, typically software under an open source license.
Benevolent dictator for life (BDFL) is a title given to a small number of open-source software development leaders, typically project founders who retain the final say in disputes or arguments within the community. The phrase originated in 1995 with reference to Guido van Rossum, creator of the Python programming language.
RPM Package Manager (RPM) is a free and open-source package management system. The name RPM refers to the .rpm
file format and the package manager program itself. RPM was intended primarily for Linux distributions; the file format is the baseline package format of the Linux Standard Base.
Simon Phipps is a computer scientist and web and open source advocate.
Couchbase Server, originally known as Membase, is a source-available, distributed multi-model NoSQL document-oriented database software package optimized for interactive applications. These applications may serve many concurrent users by creating, storing, retrieving, aggregating, manipulating and presenting data. In support of these kinds of application needs, Couchbase Server is designed to provide easy-to-scale key-value, or JSON document access, with low latency and high sustainability throughput. It is designed to be clustered from a single machine to very large-scale deployments spanning many machines.
Elasticsearch is a search engine based on Apache Lucene. It provides a distributed, multitenant-capable full-text search engine with an HTTP web interface and schema-free JSON documents. Official clients are available in Java, .NET (C#), PHP, Python, Ruby and many other languages. According to the DB-Engines ranking, Elasticsearch is the most popular enterprise search engine.
BlueSpice is free wiki software based on the MediaWiki engine and licensed with the GNU General Public License. It is especially developed for businesses as an enterprise wiki distribution for MediaWiki and used in over 150 countries.
PyTorch is a machine learning library based on the Torch library, used for applications such as computer vision and natural language processing, originally developed by Meta AI and now part of the Linux Foundation umbrella. It is one of the most popular deep learning frameworks, alongside others such as TensorFlow and PaddlePaddle, offering free and open-source software released under the modified BSD license. Although the Python interface is more polished and the primary focus of development, PyTorch also has a C++ interface.
Grafana is a multi-platform open source analytics and interactive visualization web application. It can produce charts, graphs, and alerts for the web when connected to supported data sources.
Elastic NV is an American-Dutch software company that provides self-managed and software as a service (SaaS) offerings for search, logging, security, observability, and analytics use cases. It was founded in 2012 in Amsterdam, the Netherlands, and was previously known as Elasticsearch.
The Server Side Public License (SSPL) is a source-available copyleft software license introduced by MongoDB Inc. in 2018.
OpenSearch is a family of software consisting of a search engine, and OpenSearch Dashboards, a data visualization dashboard for that search engine. It is an open-source project developed by the OpenSearch Software Foundation written primarily in Java.
The Business Source License is a software license which publishes source code but limits the right to use the software to certain classes of users. The BUSL is not an open-source license, but it is source-available license that also mandates an eventual transition to an open-source license. This characteristic has been described as a compromise between traditional proprietary licenses and open source.
Open-Source Philosophy
PyMOL is a commercial product, but we make most of its source code freely available under a permissive license. The open source project is maintained by Schrödinger and ultimately funded by everyone who purchases a PyMOL license.
Open source enables open science.
This was the vision of the original PyMOL author Warren L. DeLano.