I converted the TextMate bundle for the Elixir language (https://github.com/elixir-lang/elixir-tmbundle) into an Atom package (https://atom.io/packages/language-elixir) but it seems that something is wrong with the
elixir.cson grammar definition. Atom does not apply any syntax highlight to the
.exs files, and throw some JS errors instead (screenshot @ http://cl.ly/image/2L3d3W1x1l1n).
The original bundle works with both TextMate and Sublime Text 2.