Here at Emacs.ch we run an experimental side instance [1] based on Snac2 [2], which is a Mastodon-compatible Fediverse server written in C, runs completly file-based and features a zero-JS UI.
It doesn't have many of the fancy features of Mastodon, but is a bright example of how a super-minimal system can do the job very well. It'll also work with your mobile Mastodon apps and small browsers like Dillo[3].
It runs on OpenBSD and we accept a few more testers. There is no automatic sign-up, so if you are interested, DM me with the desired account name and I'll send you the credentials.
