Elixir's new package manager.
A client for the Ubigraph visualization server, and an easy way to view a BEAM application's supervision tree in 3D.
Manually raising exceptions, handling them, defining your own, and using them idiomatically.
Generate markup from blocks of elixir code, in the style of _why the lucky stiff's markaby.
Erlang term storage - a queryable database for your processes to store terms in.