[esafak]

There's https://zed.dev/ now

[SJMG]

Zed has a sweet sales pitch. Once they add extension support, I'll tune back in.

[joncfoo]

It already contains extension support (not sure why it's not prominently mentioned in in their docs though).

The built-in ones are here: https://github.com/zed-industries/zed/tree/main/extensions. There are others outside the main tree as well, all of which are accessible within the app.