Other B4R GitHub Repositories

The xml files apparently are not included in the github repositories.
Should they to be taken from the B4R site?

All the libraries are available in the forum. If you just want to download a library then download it from the forum.

Note that you can generate the XML file yourself with this tool: https://www.b4x.com/android/forum/threads/creating-libraries-for-b4r.65718/#content