This is a list of notable software packages which were published as free and open-source software, or into the public domain, but were proprietized, such that later versions were only released under a proprietary software license.
|Title||Original release||Relicensed release||Initial free license||Notes|
|Boot to Gecko/Firefox OS, proprietized as KaiOS||2013||2017||MPL||Still uses GPL Linux kernel, but otherwise proprietary|
|FBReader||2013||2015||GPL||Apparently the number of devs was limited, and they all agreed to relicense it.|
|LiveJournal||1999||2014||GPL||The source code was made private in 2014.|
|LiveCode||2013||2021||GPL||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.|
|October (CMS)||2014||2021||MIT License|||
|2008||2017||Common Public Attribution License||Source code was made private in 2017, as the internal codebase had already diverged significantly from the public one.|
|Tux Racer||2000||2002||GPL||Commercial expansion by original authors, also called "Tux Racer".|
|Nexuiz||2005||2012||GPL||As Nexuiz (2012 video game). Original forked into Xonotic. Several core devs agreed to relicensing the code, "Nexuiz" name, and domain; other devs disputed their right to relicense code written by non-consenting devs.|
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.