When I started with this topic, I was facing tons of repositories to dig through. So I made an attempt to sort things out a bit.
I collected all repositories I found in two powerpoint slides, maybe it is some help for others digging into the topic. I’ll update this document here from time to time if I found out something new / worth mentioning…
The last version is from June 2020. No guarantee for completeness or correctness!
BAG repositories: sorting things out (download)