I am now maintaining the code for most of my plugins on GitHub, as a means of online backup, as well as an easy way for myself to checkout to different systems and installs for testing.
If you would like to be a collaborator/contributor for code, let me know and I can add you to the project. All my projects are “private” right now, but collaborators can be added. Still also trying to figure out the Github workflow, but it integrates very well with my PhpStorm IDE.