Quantum 
Cron-like job scheduler for Elixir applications.
Setup
To use Quantum in your projects, edit your mix.exs file and add Quantum as a dependency:
defp deps do
[
{ :quantum, ">= 1.0.0" }
]
end
Then, add Quantum to the list of applications in your `mix.exs' file:
def application do
[
applications: [ :quantum ]
]
end
Usage
Configure your cronjobs in your config/config.exs like this:
config :quantum, cron: [
"* * * * *": fn -> IO.puts("every minute") end,
"*/2 * * * *": fn -> IO.puts("every two minutes") end,
# Runs on 18, 20, 22, 0, 2, 4, 6:
"0 18-6/2 * * *": fn -> IO.puts("it's late") end,
# Runs every midnight:
"@daily": &backup/0
]