- Language homepage - duh
- RTFSource - seriously, the language source is predominantly written in Elixir by way of bootstrapping macros, and IMHO is incredibly readable and enlightening
- Plug repo - more great source code to read
- Phoenix Guides
- Other Phoenix resources
- ElixirSips - premium screencasts ala RailsCasts, etc.
- Elixir-lang Slack team - very active, rather friendly, lots of niche channels around i.e. Phoenix, Ecto, etc.
- #elixir-lang IRC channel on Freenode
- Core Elixir - series of charmingly-illustrated blog posts that deep dive into parts of the stdlib
- Elixir Radar - community news mailing list from Plataformatec