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

ionCube PHP Accelerator
ionCube PHP Accelerator - 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] www.php-accelerator.co.uk

MAMP
MAMP - Provides an all in one solution to install Apache, PHP and MySQL on a Mac OS environment. www.mamp.info

PEAR: Benchmark
PEAR: Benchmark - Provides a framework to benchmark PHP scripts and function calls. The PEAR site also contains hundreds of other pre-built packages. [Open source, GPL] pear.php.net/package/benchmark

PECL
PECL - A full-featured profiler/debugger that is loaded as a zend_extension. It aims to be an analog of C's gprof or Perl's Devel::DProf. Offered from PHP.net [Open source, GPL] pecl.php.net/package/apd

PHP Application Tools
PHP Application Tools - A PHP directory offering tools and modifications for common PHP applications. Offerings include pre-written classes, bulletin board code and an XML renderer. www.php-tools.net

PHP Backend
PHP Backend - An online tool that accelerates database forms and script development. It converts database structure definition into a PHP application that allows you to manipulate data. Schematic and troubleshooting data also available. [Commercial] www.phpbackend.com

PHP Object Generator
PHP Object Generator - Browser-based object generator and testing tool. Creates PHP and MySQL code. Also available as a zip file. [Freeware] www.phpobjectgenerator.com

PHP Processor
PHP Processor - Tool that optimizes PHP, HTML and JavaScript code by removing unnecessary data; the optimization process also obfuscates the code. Viewable project information, interface and screen shots also available through the website. [Commercial] www.gridinsoft.com/protect.php

phpAspect
phpAspect - Language extension for Aspect-Oriented Programming; compiler weaves aspects implementing crosscutting concerns into PHP source code; weave is static (before source code executes), based on Lex and Yacc analysis to generate XML parse trees. [Open source, CCL] www.phpaspect.org

phpBeans
phpBeans - Provides software and specifications for enabling n-tier development within PHP, such as the phpBeans Object Server, and interoperable with other languages as well. [Open source, GPL] www.phpbeans.com

phpGTK User Language (GUL)
phpGTK User Language (GUL) - A free Xul-like markup language for describing user interfaces with PHP-GTK extension. gul.redsofa.net

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PHP.REP
PHP.REP - A project to join PHP, which has many libs, and REP, which is powerful. phprep.sourceforge.net

phpScaffold
phpScaffold - Online CRUD scaffold creator for MySQL. Generates code from MySQL query in PHP for copying into existing code. [Free, Browser-based] www.phpscaffold.com

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

PSD
PSD - A visual frontend for debugging PHP. It runs on Win98SE and newer and can be used remotely. [Freeware] psd.schnitzke.net/index.php?framed=1

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

Rapid PHP Editor
Rapid PHP Editor - Editor for PHP, but also HTML, XHTML, CSS and JavaScript code with validation, reuse, navigation and formatting functions, syntax highlighting, PHP debugger, PHP function hints, file and FTP explorer, and code templates. [Shareware] www.blumentals.net/rapidphp

RedKernel Referer Tracker
RedKernel Referer Tracker - A powerful referer tracking script that will draw detailed graphics depending on the period, the referring domain and the audited host. rkrt.redkernel-softwares.com

RegExp.net
RegExp.net - Online tool to check and tweak regular expressions. Supports ereg, eregi and preg_match. www.regexp.net

Roadsend Compiler for PHP
Roadsend Compiler for PHP - Produces optimized stand alone applications, libraries, and Web applications from standard PHP source code. www.roadsend.com/home/index.php?rID=root&pageID=compiler

Simple Test for PHP
Simple Test for PHP - PHP unit tester and mock objects framework. [Open source, Open Group Test Suite License] www.lastcraft.com/simple_test.php

StarPhP
StarPhP - A PHP and HTML editor designed to be a lightweight and easy to use application. www.starphp.com

Top PHP Studio
Top PHP Studio - An editor which is designed for PHP programming language. Top PHP Studio has internal HTTP-server and internal browser to test PHP scripts. [Shareware] www.top-systems.net/Top-PHP-Studio

TurboPHP
TurboPHP - A Windows program which uses an extendable Delphi or VB-like component model for PHP-based web programming. www.turbophp.com

Turck MMCache
Turck MMCache - An open source PHP accelerator, encoder and dynamic content cache for PHP that also features an optional obfuscator. Features a standalone loader, an API, and installation notes. [Open Source] turck-mmcache.sourceforge.net/index_old.html

VS.Php for Visual Studio .Net
VS.Php for Visual Studio .Net - A PHP editor built on top of Visual Studio .Net . www.jcxsoftware.com/vs.php

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

Waterprood SARL
Waterprood SARL - Provides a PHP IDE for Windows, a regular expression debugger and code reformater application. [Commercial] www.waterproof.fr

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

Website Databases
Website Databases - Windows software that generates PHP scripts to create and manage MySQL databases. Database Converter software also available. www.websitedatabases.com

WizzyWeb
WizzyWeb - Web-based rapid application development (RAD) tool for creating database applications optimized for PHP MySQL. Also supports PEAR:DB for creating applications for Oracle, SQL Server, Sybase, and IBM. Offers custom HTML data entry forms, reports and supporting back-end code. [Free] www.wizzyweb.com

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

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

ZZEE PHP GUI
ZZEE PHP GUI - Easily run PHP scripts in GUI mode in Windows - just by double-click www.zzee.com/script-gui

ByteRun Protector for PHP
ByteRun Protector for PHP - PHP script encoder and trialware creator with a graphical interface with several editions available. The website also offers a web-based free PHP encoder accessible through a free membership as well as support through a newsletter and forum. [Commercial] www.byterun.com/php-protector.php

CodeLock
CodeLock - Obfuscates PHP code as well as the HTML output. Supports password protection, IP restriction, and the setting of expiry dates. Website also offers FAQs, demos, and a detailed explanation on how the encryption is performed. [Commercial, Free trial] www.codelock.co.nz

ionCube PHP Encoder
ionCube PHP Encoder - Offers both a standalone download as well as an online service for encoding PHP scripts. Site features testimonials, commercial partners and support through request tickets and a forum. [Commercial, Free trial] www.ioncube.com

Obfusc
Obfusc - Obfuscates PHP code while providing full control over the obfuscation process. The software obscures strings and removes whitespaces and comments. Featured in the website are screen shots, sample obfuscations, FAQs and contact information. [Commercial] www.obfusc.com

PHP Code Uglifiers
PHP Code Uglifiers - Eliminates white spaces, line feeds and comments from PHP and JavaScript code with a command line tool. Features an online live test with an uploaded PHP file. [Commercial, Demo version available] www.all-dynamics.com/products/codeuglifier

phpCipher
phpCipher - Online PHP encoder with client management and licensing system. Knowledge base includes online support, user manual, sample code, and a demonstration of use. [Free for personal/non-commercial] www.phpcipher.com

phpObfuskator
phpObfuskator - Renames variables, removes comments and white spaces from PHP files. Offered through Google Code with wiki information and known issues. [Open source, GPL] code.google.com/p/phpobfuskator

phpShield
phpShield - Converts PHP source code into unreadable bytecodes for Windows, Linux and Mac OS X. Website also includes full documentation and free loaders for supported platforms. [Commercial, Free trial] www.phpshield.com

POBS
POBS - Open source PHP and JavaScript obfuscator featuring renamings, concatenations comment deletions. Code no longer being maintained. Website offers advantages and disadvantages, debugging tips and sample usage. [Open Source, GPL] pobs.mywalhalla.net

RaizLabs
RaizLabs - Offers a free PHP obfuscator for Windows. Contains sample code, developer and support information as well as information about the design company. [Open Source, GPL] www.raizlabs.com/software/phpobfuscator

SourceGuardian
SourceGuardian - Obfuscation and encryption for PHP files. Offers customizable constants, Zend extension support and encrypted IP addresses and domain names. Website includes upgrade information, testimonials, and loaders for supported platforms. [Commercial, Demo available] sourceguardian.com

Thicket Obfuscator
Thicket Obfuscator - Commercial tool that obfuscates PHP source code, making it difficult to understand. Features a command line and visual interface. Website includes product news, other commercial services and additional software for a variety of languages. [Commercial, Trial version] www.semanticdesigns.com/Products/Obfuscators/PHPObfuscator.html

TrueBug PHP Encoder
TrueBug PHP Encoder - Available for Windows, allows the running of scripts under virtual hosting accounts with no change to the default PHP installation and requires no changes to the standard web server installation. [Commercial, Free trial] www.truebug.com

Zend Guard
Zend Guard - Formerly known as Zend Encoder, protects PHP applications for secure deployment without exposing the source code. Website details additional products, certifications and a developer zone. [Commercial] www.zend.com/products/zend_guard

Beautify PHP
Beautify PHP - Tool reformats PHP source code to make the script more readable and easier to understand. www.bierkandt.org/beautify

PHP Formatter/Obfuscator
PHP Formatter/Obfuscator - Tools to prettyprint PHP and make it more readable, or to obfuscate the source and make it difficult to reverse-engineer. [Commercial] www.semdesigns.com/Products/Formatters/PHPFormatter.html

PHP Pretty Printer
PHP Pretty Printer - Online tools for source code formationg. Also can be used for Java, C++ and C. www.prettyprinter.de

Polystyle
Polystyle - Code beautifier that learns personal formats and styles other source files in that manner. www.polystyle.com

ScrEnc
ScrEnc - A handy utility to scramble (obfuscate) HTML, JavaScript/JScript, C/C++/MFC code. [Shareware] www.dennisbabkin.com/php/download.php?what=ScrEnc

SQCBW
SQCBW - Source code beautifier indents source code lines according to the structure of the program; supports complex expressions, trailing comments and conditional compilation. For C/C++/C# and Java/J#. [Shareware] www.sqcbw.com

Adobe RoboHelp
Adobe RoboHelp - Training and consulting for RoboHelp family of products. Offers support options, product specifications, and ordering information for this line of help authoring tools. www.adobe.com/products/robohelp

Color+Code
Color+Code - Stores and colorize code snippets and its error message, if any. To be used for showcasing code snippets in forums, newsgroups or any other media where code coloring is not possible. code.doria.se

DOC++
DOC++ - Generates TeX and HTML documentation from comments in C, C++, IDL, and Java files. [Open Source, GPL] docpp.sourceforge.net

Doc-To-Help
Doc-To-Help - A help authoring tool and add-ons. By ComponentOne. www.componentone.com/helptools.aspx?helptoolscode=1