To add a few less popular options, I really liked working with TextAdept. Almost the whole API is accessible via Lua and you can script the heck out of that edi

To add a few less popular options, I really liked working with TextAdept. Almost the whole API is accessible via Lua and you can script the heck out of that editor. The challenge with that is that you don't get a lot of items out of the box. The community is awesome though and the author of the project is very responsive in github. There's also Lite XL, which is also a very hackable editor. Also hackable in Lua. The documentation for it is a bit lacking but one can jump into the code and start tweaking things in it. There's also micro. This one also uses Lua for writing plugins and such. It's a terminal editor if that's something you are interested in.