Well nvim, obviously. It’s pretty much fully featured. With LSP plugins you get all the code completion, hints, type info, docs and so on. You also get typical navigation like ‘go to declaration’ and some basic refactoring. And all inside the best editor there is. I’m using it for C, JS, JSX and Rust and all works great. I honestly prefer it to IntelliJ, it loads faster and is more responsive.