Directory of Discourse help topics from many forums

The questions came up at Feverbee so I made this directory from Discourse sites publicised on this site. It may give some good ideas to people wanting to see what is out there. You can certainly find some good sites by finding good help topics. But the directory is only help topics rather than the vastly greater number of topics with useful help.

Iā€™m open to suggestions about what help topics would help Discourse admins and users.