My favorite use is automated browser testing. Examples: - in Ruby, poltergeist (https://github.com/teampoltergeist/poltergeist https://github.com/teampoltergei

My favorite use is automated browser testing. Examples: - in Ruby, poltergeist (https://github.com/teampoltergeist/poltergeist https://github.com/teampoltergeist/poltergeist) - in Elixir, hound (https://github.com/HashNuke/hound https://github.com/HashNuke/hound)