[xpe]

Obligatory mention of SubEthaEdit: "General purpose plain-text editor for macOS. Widely known for its live collaboration feature."

And, as of 2018, is now open source. Looks like it has had commits as recently as 2022: https://github.com/subethaedit/SubEthaEdit

See also a previous HN discussion at https://news.ycombinator.com/item?id=18550649

[blinry]

We picked our name because of SubEthaEdit (and later, Etherpad)! :)

We keep a table of related project here: https://ethersync.github.io/ethersync/related-projects.html

Ping us if you feel like something's missing! (Looks like we could add Zed, for example.)