* 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.

* PHP4 compatibility. * Full support for UTF-8. * Built-in support for multiple databases. * Template engine and RBAC control. * Supports data caching and plug-in mechanism.