I use IntelliJ-Rust with the IDEA vim plugin daily and I recommend it. I can jump to definition for functions, get some autocomplete and type inference (it's not perfect) and the project is actively maintained. Moreover, the maintainers are very welcoming and it's a pleasure to work with them to fix bugs and submit PRs.

https://intellij-rust.github.io/

VS Code with RLS is amazing. Still a work-in-progress, but some stuff works and it's only going to get better.

I'm mostly just used to sublime and vim with minimal tooling so it doesn't matter as much for me. But I'll probably eventually write a plugin for RLS for sublime.

A single tmux window, with vim on the left (with no special IDE plugins). On the right, autocall.zsh watches ./src and runs 'cargo build' whenever a file changes. (More specifically, I autocall running in a small pane up top and have it run cargo build piped through less [but you need to fake this as a tty to get cargo to output colors] in a specific, larger pane on the bottom.

Sublime with the Rust plugin. It works well for small projects but I haven't yet tried this with a large project.

Atom with a properly configured racer and rustfmt has been nice, though I have run into one or two very minor annoyances.

nvim with Rust syntax support works for me.