Awesome

cuid

Collision-resistant ids optimized for horizontal scaling and sequential lookup performance, written in Elixir.

For full rationale behind CUIDs refer to the main project site.

Add Cuid as a dependency in your mix.exs file:

defp deps do:
    [{:cuid, "~> 0.1.0"}]
end

Run mix deps.get to fetch and compile Cuid. It works as a process

{:ok, pid} = Cuid.start_link
Cuid.generate(pid)  # => ch72gsb320000udocl363eofy

Each CUID is made by the following groups: c - h72gsb32 - 0000 - udoc - l363eofy

c identifies this as a cuid, and allows you to use it in html entity ids. The fixed value helps keep the ids sequential.
h72gsb32 is a timestamp
0000 is a counter
udoc is a fingerprint. The first two characters are based on the process ID and the next two are based on the hostname. This is the same method used in the Node implementation
l363eofy random (uses :random.uniform)