Slim is a PHP micro framework that helps you quickly write simple yet powerful web applications and APIs.
Features :
Powerful router
Standard and custom HTTP methods
Route parameters with wildcards and conditions
Route redirect, halt, and pass
Route middleware
Template rendering with custom views
Flash messages
Secure cookies with AES-256 encryption
HTTP caching
Logging with custom log writers
Error handling and debugging
Middleware and hook architecture
Simple configuration
To know more about Slim visit here : http://phpmaster.com/working-with-slim-middleware/