MAMP installs a local server environment in a matter of seconds on your computer. It comes free of charge, and is easily installed. MAMP will not compromise any existing Apache installation already running on your system. You can install Apache, PHP and MySQL without starting a script or having to change any configuration files! Furthermore, if MAMP is no longer needed, just delete the MAMP folder and everything returns to its original state (i.e. MAMP does not modify any of the 'normal' system).
Apache, the open source http web server is one of the primary parts of MAMP. Because of its modular structure, it can easily be enhanced with add ons. MAMP comes with over 70 Apache Modules such as PHP, SSL, Webdav, Auth, Cache and many more. Many ISPs use Apache, making MAMP the perfect tool for testing your websites locally before releasing them.
Nginx is a web server. It can act as a reverse proxy server for HTTP, HTTPS, SMTP, POP3, and IMAP protocols, as well as a load balancer and an HTTP cache.
A database is at the heart of every modern, dynamic website. MAMP comes with MySQL which is the most commonly used relational database system. There is a MySQL interface for nearly every programming and scripting language available. Thanks to MAMP you can easily develop complex MySQL database applications on your local PC and upload them afterwards on to your live system. For easy configuration MAMP PRO comes with phpMyAdmin.
Screenshots MAMP for Mac