I can provide hosting for a git repo on my Dreamhost shared server, if GitHub is a problem for some people. I’ll gladly hand over SSH credentials to someone who knows how to setup gitolite (
https://github.com/sitaramc/gitolite/) or another solution for multi-user git hosting. If this doesn’t work on a shared hosting environment, then maybe someone else has a VPS instance they can throw out there?
GitHub is nice for issue tracking and moving quickly, and it’s exceptionally easy for newbies (i.e. content, if it’s in markdown files, can be edited right in the GitHub UI), but I totally understand reservations that some people have with a third-party service. Just my two cents.