* HTTP Router: Slim provides a fast and powerful router that maps route callbacks to specific HTTP request methods and URIs. It supports parameters and pattern matching. * Middleware: Build your application with concentric middleware to tweak the HTTP request and response objects around your Slim app. * PSR-7 Support: Slim supports any PSR-7 HTTP message implementation so you may inspect and manipulate HTTP message method, status, URI, headers, cookies, and body. * Dependency Injection: Slim supports dependency injection so you have complete control of your external tools. Use any Container-Interop container.

* Symfony Framework: The leading PHP framework to create websites and web applications. Built on top of the Symfony Components. * Symfony Components: A set of decoupled and reusable components on which the best PHP applications are built, such as Drupal, phpBB, and eZ Publish. * Symfony Community: A huge community of Symfony fans committed to take PHP to the next level. * Symfony Philosophy: Embracing and promoting professionalism, best practices, standardization and interoperability of applications.