androidsideloader
This repo
New repo
androidsideloader uses the GPL license, any forks of it must have their source code made public on the internet.
!IMPORTANT!
This app may be buggy and have problems.
This app might get detected as malware, however both the sideloader and the sideloader launcher are open source. And obviously, it isn't.
See:
https://www.virustotal.com/gui/file/46b6e24a03a6670dfbbde6e6f06caac05f2f9486115ef7bd77e0b568df7e5342/detection