EasyPHP A software package for Windows includes an Apache server, a MySQL database, a fully PHP execution, as well as some PHP development tools. http://www.easyphp.org/

PHPTriad A Windows installer for an Apache/PHP/MySQL/Perl environment. http://www.phpgeek.com/phptriad.html

QaDRAM a Delphi-like RAD tool for PHP. http://www.qadram.com/

Web-based PHP Class Generator A very basic PHP class builder to generate class templates useful for object-oriented programming in PHP. http://www.card2u.com.my/ClassBuilder/

PHPEdit A full featured PHP IDE for Windows. It has code insight, code completion, syntax-highlighting, integrated debugger, code browser, keyboard templates. [Open source, PHPEdit licence] http://www.phpedit.net/

PHP4HS (PHP Development Extensions for HomeSite) The spot for people using HomeSite for PHP or ASP development to find help and to exchange add-on extensions, resources, help, links, tips, requests and articles. http://www.wilk4.com/asp4hs/php4hs.htm

ionCube PHP Accelerator A PHP extension to the PHP Zend engine that accelerates compilation and execution of scripts. Works particularly well with the Smarty templating system. http://www.php-accelerator.co.uk/

Javuh An organized distribution of PHP classes, including the Psychoo site modeling system, Internet protocols, database abstraction. http://www.javuh.com/

Zend Studio Integrated Development Environment for PHP. Versions for linux, Mac and Windows. [Commercial] http://www.zend.com/store/products/zend-studio.php

PHP Coder An Integrated Development Environment for PHP. A freeware tool for PHP programmers, more than just an editor. [Window9x/NT] http://www.insearchnow.com/

PhormGen Builds a completely functional PHP add/edit/delete script based on the MySQL table definition. [Shareware, also online demo] http://www.phormgen.com/

PHP Debugger A tool that allows you to execute php script in step-by-step manner, and trace down errors. http://dd.cron.ru/dbg/

UMA A PHP user management and authentication system. Utilizes a MySQL database, object-oriented design. Formerly known as Rampart. [Open source, LGPL] http://neverwillbes.com/uma/

Analog X - PHP Config Front end to the php.ini file. Includes graphical components for the standard PHP configuration options, plus the ability to add in 'other' configuration directives, such as for the zend optimizer. Windows only. Freeware. http://www.analogx.com/contents/download/network/phpconf.htm

DzSoft PHP Editor A functional php editor with tiny web server build-in. http://www.dzsoft.com/dzphp.htm

Dev-PHP A full-featured Integrated Development Environment for PHP on Windows. It's fast, powerful and has a user-friendly interfase. It has many cool features, like Function browsing and full integration with the PHP parser and the PHP-GTK library. [Open source, GPL] http://devphp.sourceforge.net/

FoxServ An Apache, mySQL, PHP installer package for Windows. It support user defined configuration during installation, PHP as a module, PEAR, and the Zend Optimizer. http://www.foxserv.net/

PHPEclipse A PHP IDE built as an Eclipse plugin. It takes advantage of a well-designed, robust and widely used application framework. [Open source, Common Public License] http://phpeclipse.sourceforge.net/

Zend Performance Suite for PHP Performance accelerator for PHP, with content-caching, compression and compiled-code caching. [Commercial] http://www.zend.com/store/products/zend-performance-suite.php

Zend SafeGuard Suite for PHP Protects and licenses PHP applications for secure deployment without exposing the source code or fear of piracy. [Commercial] http://www.zend.com/store/products/zend-safeguard-suite.php