1. Elixir senseProvides context-aware information for code completion, documentation, go/jump to definition, signature info and more
2. Elixir LsA frontend-independent IDE "smartness" server for Elixir. Implements the "Language Server Protocol" standard and provides debugger support via the "Debug Adapter Protocol"
4. coc-elixirElixir language server extension based on elixir-ls for coc.nvim