Open source

any program whose source code is made available for use or modification as users or other developers see fit

Hanna, Katie Terrell. “Open Source.” WhatIs, 30 Sept. 2021, www.techtarget.com/whatis/definition/open-source#:~:text=The%20term%20open%20source%20refers,freely%20available%20to%20the%20public.