- https://allthe.codes/ - operator, user
- https://bayareabiketowork.com/ - former developer
- c is private
- https://discourse.gohugo.io/ - moderator
- https://en.wikipedia.org - editor
- https://formal.maiki.xyz/ - publisher
- https://gohugo.io/ - user
- http
- https://interi.org (not current) - publisher
- j; nothing in particular
- https://kodi.wiki/ - user
- https://last.interi.org/ - publisher
- https://mastodon.sdf.org/ - publisher, user
- https://newsboat.org/ - user
- https://opengameart.org/ - user
- https://www.paypal.com/ (ugh) - user
- q; nothing in particular
- https://www.roadtripusa.com/ - former developer
- https://swappa.com/ - user
-
http://archive.v1.talkgroup.xyz/
- publishing, user - u is private
- https://www.vox.com/ - user
- www
- x; nothing in particular
- https://youtube (I don’t use it much, but apparently Y is not popular otherwise) - user
- z; nothing in particular
We used to share these, typing in one letter and see the top URL for one’s browser. For me “c” and “u” both contain several URLs that are private (because I do weird DNS stuff, or because banking).
If nothing else it shows which letters are ripe for the domains. 
Update: I tagged each entry with an abstract description of my relationship with each.