To save others the lookup:<p>"Amber is a web development framework written in the Crystal programming language. The framework implements the server-side MVC pattern using the object-oriented paradigm. Many of Amber's components and concepts will be familiar for developers with experience with other web frameworks like Phoenix, Ruby on Rails or Python's Django."<p><a href="https://docs.amberframework.org/amber/" rel="nofollow">https://docs.amberframework.org/amber/</a>