A few weeks ago I started to build a forum based on Woltlab's Community Suite. I did so, because the support was limited to gitter.im and Google+ before - Gitter is pretty cool, but if there are more complex topics, maybe a few users are discussing different topics at the same time, gitter becomes confusing really fast.
Google+ is fine, but you have to use a Google-Account - not everybody wants to create one - and features like syntax highlighting or a powerful search are missing.
The new forum fills the gap and allows you to create a new account by registering it manually or connect using your Github-, Twitter-, Facebook- oder Google-Account.
Feel free to join us.