XAMPP 1.8.3 (PHP 5.5)
Xampp is the best PHP + Mysql development environment. It is completly free and easy to install distribution, containing PHP, MYSQL, APACHE, PERL.

                                                                     Download For Windows

                                       DOWNLOAD FOR OS X(MAC)

                                                                     DOWNLOAD FOR LINUX
Features:-
  • Easy to Install, Configure and Use.
  • Completly free of charge
  • Available on multi-platform such as Windows, Linux and Mac OS
  • Most popular and widely use distribution.