So let's look at the diod project. It claims to be a p9 sever. The changes link goes to a long list of releases which appears to say it's been in development for a while. But the downloads link takes us to a page that says it has no downloads.
Ok, so let's click on the owner link, which gives us a truncated email address (presumably for anti-spam purposes) with no way to actually contact this person. There is no link for a mailing list.
This manages to be less user friendly than Savannah, which is an accomplishment. (Which is sad, because one of their recently announced features actually looked kind of interesting.)