A bottom-up rewrite of the PHP scripting engine. It features a modular architecture, vastly improved performance, and greater scalability. [Commercial]

Provides an all in one solution to install Apache, PHP and MySQL on a Mac OS environment.

Software package for Windows includes an Apache server, a MySQL database, PHP 5.2.0, as well as some PHP development tools. The installation files, website and product support are also available in French and Spanish. [Freeware]

A further development of the Turcke MMCache project. The tool increases performance of PHP scripts by caching them in a compiled state. Wiki data, tickets and recent changes also available for viewing. [Open source, GPL]

WAMP5 installs Apache, PHP5 and MySQL on Windows platform. It comes with a service manager as an icon tray and lots of options.

Standards-compliant HTML filtering library written in PHP. Plug-ins, demo, and forums also available through the website. [Open source]

Client-side tool to convert ASP (Classic) to PHP by Robert Giordano. Also includes cross-referencing utility. [Freeware]

A PHP extension for powerful debugging. It supports stack and function traces, profiling information and memory allocation and script execution analysis.

A combined Apache, MySQL, and PHP installer package for Windows and Linux. It supports user-defined configuration during installation including PHP as a module, PEAR, and the Zend Optimizer. The website also offers a support forum. [Freeware]

A PHP extension to the PHP Zend engine that accelerates compilation and execution of scripts. Also works with the Smarty templating system. Available for BSDi, Linux, OpenBSD, FreeBSD, and Solaris. [Freeware]