Gregory's Server
(One for techy people today...)
Command line / terminal fans!
You can use Mastodon through a command line interface or a terminal user interface using the third party app "toot" for Linux etc:
It's free and open source, find out more at the link.
This also works with Mastodon-compatible servers.
By the way, this app toot has nothing to do with the other third apps Toot! or Tooot, they just have very similar names.