Since we switched to Slack as the primary means of communication at work, Slack has grown to be my favorite chat application. Not only does it have a very pleasant interface, but it also offers great ways to integrate it with your application. As a matter of fact, their API is among the least restrictive ones in my experience. As a result of the joy of working the Slack API, Slack chat module was born to serve as a proof of concept for embedded Drupal-to-Slack chat functionality.