
Amfphp is a library for creating PHP-based application back ends. Key features are support for AMF among other Protocols, and developer tools such as a service browser, a client code generator, and a performance profiler. Amfphp is used primarily for games and Apache Flex business applications.

Associate-O-Matic, developed by Gyrofly, Inc., was a commercial online store management system for Amazon.com Associates. It was PHP-based, using the Apache web server and XML.

BlueSpice MediaWiki is free wiki software based on the MediaWiki engine and licensed with the GNU General Public License. It is especially developed for businesses as an enterprise wiki distribution for MediaWiki and used in over 150 countries.

CodeCharge Studio is a rapid application development (RAD) and integrated development environment (IDE) for creating database-driven web applications. It is a code generator and templating engine that separates the presentation layer from the coding layer, with the aim of allowing designers and programmers to work cohesively in a web application.

Composer is an application-level package manager for the PHP programming language that provides a standard format for managing dependencies of PHP software and required libraries. It was developed by Nils Adermann and Jordi Boggiano, who continue to manage the project. They began development in April 2011 and first released it on March 1, 2012. Composer is strongly inspired by Node.js's "npm" and Ruby's "bundler". The project's dependency solving algorithm started out as a PHP-based port of openSUSE's libzypp satsolver.

Epesi is an open source, PHP/Ajax framework for rapid development of web based, database driven applications. The framework includes the Epesi CRM multiuser application. It requires PHP 5.x and MySQL or PostgreSQL database server on the server side and can be accessed using any modern browser. Epesi framework and Epesi CRM application are released under MIT license.

Faveo is an ticket based support system built on the PHP based Laravel framework. The word Faveo comes from Latin, and means "to be favourable". It provides businesses with an automated helpdesk system to manage customer support. It has an inbuilt knowledge base for self-service by the customer.

Find My Kids is a mobile application that allows parents to monitor the location of their children. The family GPS-tracker was created in 2016 and it is used to track locations. It is intended primarily for tracking the geo-location and movements of a child using a mobile application or special children's watches with GPS support. The service notifies parents of the exit from the established zones and records the child's movement history in the absence of access to the Internet. The application has about 2 million users worldwide.

Flash MP3 Player is a web application that allows users to create a music player on their website. It is based on Flash and PHP, but it can be installed without any programming skills. Users are simply required to embed a piece of HTML code into their website and application automatically generates a playlist by scanning a specified folder for MP3 files and using ID3 tags for naming. The looks of the application is customizable via XML file.

FuelPHP is an open-source web application framework written in PHP which implements the HMVC pattern.

KnowledgeBase Manager Pro is enterprise class knowledge management software used for automation of knowledge management process on each level. The first version of this program was released in the beginning of the 2009. Since that time, new updates come out every quarter of the year.

MangoO Microfinance Management is a free and open-source software solution for the management of small-scale microfinance institutions (MFIs).

Mantis Bug Tracker is a free and open source, web-based bug tracking system. The most common use of MantisBT is to track software defects. However, MantisBT is often configured by users to serve as a more generic issue tracking system and project management tool.

Midgard is an open source persistent storage framework. It provides an object-oriented and replicated environment for building data-intensive applications.

NolaPro is a cloud / web-based ERP application running under a proprietary commercial license. It was first released in 2003 as a freeware accounting alternative to SAP ERP and QuickBooks because of its ability to scale in these markets.

Phorum is an open source message board system written in PHP.

PHP-GTK is a set of language bindings for PHP which allow GTK+ GUI applications to be written in PHP. PHP-GTK provides an object-oriented interface to GTK+ classes and functions. While PHP-GTK partially supports GTK2, GTK3 is not supported at all.

phpBB is an Internet forum package in the PHP scripting language. The name "phpBB" is an abbreviation of PHP Bulletin Board. Available under the GNU General Public License, phpBB is free and open-source.

PhpGedView is a free PHP-based web application for working with genealogy data on the Internet. The project was founded and is headed by John Finlay. It is licensed under GPL.

PMB is a fully featured open source integrated library system. It is continuously developed and maintained by the French company PMB Services.

The Simple Cloud API is an API. It enables users to access cloud application services written in the PHP programming language across different cloud computing platforms. It was launched in 2009 by Zend Technologies.

Squiz is a digital experience management company that provides web content management, search and analytics as part of its digital experience platform.

Textpattern is a free and open-source content management system (CMS) based on PHP and MySQL, originally developed by Dean Allen and now developed by Team Textpattern. While it is often listed among weblogging tools, its aim is to be a general-purpose content management system suitable for deployment in many contexts. The current stable version is Textpattern 4.8.4.

Wall.fm is an online service for people to build and host social networking services, powered by Oxwall software. Wall.fm allows users over 18 years old to register a free account and create custom social networking websites. The site creation process does not involve any coding, and consists of only two steps. The distinctive Wall.fm features are user roles, customizable themes, activity newsfeed, website/profile/content privacy, monetization pack. One of its main competitive advantages is that the service is built on an open source platform, which means a certain degree of freedom for site owners. Wall.fm offers three plans: Starter, Pro and Ultimate. Plans offer different feature sets, disk space and bandwidth, individual support and vendor's branding removal. Every plan offers free trial.
WebSphere sMash was a development and runtime environment from IBM for the creation of dynamic web applications using the scripting languages Apache Groovy and PHP. It contained a PHP runtime written in Java. Project Zero was the experimental software development community in which new versions of WebSphere sMash were incubated. WebSphere sMash was withdrawn from sale in 2012, with support discontinued in 2014.

webtrees is a free open source web-based genealogy application intended for collaborative use.

Xdebug is a PHP extension which provides debugging and profiling capabilities. It uses the DBGp debugging protocol.

XenForo is a commercial Internet forum software package written in the PHP scripting language. The software is developed by former vBulletin lead developers Kier Darby and Mike Sullivan. The first public beta release of XenForo was released in October 2010, the stable version on March 8, 2011. The program includes several search engine optimization (SEO) features.

Yoast SEO is a search engine optimization (SEO) plug-in for WordPress. The plugin has five million active installations and has been downloaded more than 202 million times.