LibreELEC

LibreELEC (short for Libre Embedded Linux Entertainment Center) is a non-profit fork of OpenELEC as an open source software appliance, a just enough Linux distribution for Kodi. This fork of OpenELEC announced in March 2016 as a split from the OpenELEC team after "creative differences", taking most of its active developers at the time to join the new LibreELEC project.
This is a conservative fork of the OpenELEC project with a stronger focus on pre-release testing and post-release change management.
History.
Because of the end of Python 2 support in 2020, LibreElec version 10 with Kodi 19 switches to "Python 3". Therefore, addons created for prior versions with "python 2" need to be updated by developers for Kodi 19 because python code is not backward compatible.