I have installed:
- atom-elixir
- atom-elixir-playground (I’m not sure if I’ve ever touched this one yet though)
- autocomplete-elixir (love it)
- build-elixir
- elixir-cmd
- language-elixir
- linter-elixir-credo (love it)
- phoenix-elixir-snippets
I’m not entirely sure all which commands and functionality I use from which, but I like my work-flow.
EDIT: I also use Elm, and the atom-plugins for elm well out-do that for other IDE’s.