I just joined the Codeberg e.V. as an active member.
The mission of the Codeberg e.V. is to build and maintain a free collaboration platform for researching, creating, archiving, and preserving knowledge, code, and to document its development process.
I really like Codeberg and its mission and use the platform for some of my projects. Today, a fellow student / colleague asked me a few questions about it, then joined himself. That inspired me to actually join now too, instead of sometime in the future.
More Information about Codeberg on their website or blog. Joining is possible here.