Joomla! is one of the most powerful Open Source Content Management Systems on the planet. It is used all over the world for everything from simple websites to complex corporate applications. Joomla! is easy to install, simple to manage, and reliable.

A content management script that is fully customizable. Create an instant community website with this great PHP based script!

PostNuke is a weblog/Content Management System (CMS). It is far more secure and stable than competing products, and able to work in high-volume environments with ease.

phpWebSite provides a complete web site content management system. Web-based administration allows for easy maintenance of interactive, community-driven web sites.

XOOPS is a dynamic OO (Object Oriented) based open source portal script written in PHP. XOOPS is the ideal tool for developing small to large dynamic community websites, intra company portals, corporate portals, weblogs and much more.

A professional level yet easy to use Content Management System featuring inline WYSIWYG content editors, newsfeeds, syndicated news, banners, mailing users, links manager, statistics, content archiving, date based content, 20 languages, modules and components.

Drupal is an open-source platform and content management system for building dynamic web sites offering a broad range of features and services including user administration, publishing workflow, discussion capabilities, news aggregation, metadata functionality using controlled vocabularies and XML publishing for content sharing purposes.

Geeklog is a weblog powered by PHP and MySQL. It allows you within minutes to set up a fully functioning dynamic website, and has many features to get you started

Siteframe is a community content management system written in PHP4 and MySQL. It separates presentation from content by means of a template/macro system, and supports online user registration/validation and online editing of content. There is extensive support for images built-in (automatic thumbnails and resizing), and is often used for image libraries and photography interest groups.

phpWCMS is perfect for professional, public and private users. It is very easy to learn and gives you the flexibility to separate layout and content. Lots of powerful but simple implemented features assists publishers and web developers too.

From basic, informational websites to robust e-business applications, this script vastly simplifies the creation and management of cutting-edge internet solutions. It installs at the end-users web site and empowers novices and seasoned developers alike with a streamlined development and management process unmatched by any other software product.

Use Templates Express to install static templates to your website. You will need to use FTP and edit the html files, replacing the default text with your own text. Standard information like title, name, address and similar will be collected during installation and placed into the installed template in the appropriate locations.

pMachine is online publishing's most flexible and creative software. With pMachine, you can publish virtually any kind of web content - from a basic weblog, to an advanced interactive magazine. pMachine gives you complete control over the presentation and the interactivity of your site.

A classy news/weblog tool (aka logware), i-e software allowing you to run newsfeeds and weblogs

A Content Management System (CMS): a powerful set of PHP scripts that allow you to maintain one or more weblogs or online journals

A state-of-the-art semantic personal publishing platform with a focus on aesthetics, web standards, and usability.  It is the official successor of b2/cafelog, as b2 development has stopped.

A live Help support chat system that allows the operators of the websites to monitor their visitors as they are browsing the site and proactively open a chat session with the visitor. Other features include either text based database or mySQL database, chat notification, user is typing message, multiple chat sessions and multiple operators.

PHP Support Ticket is an application which allows you to offer your web site users a way to request Support Tickets.

SSM is your complete support desk, knowledge base management, and customer relations management solution!

Help Center Live is a powerful tool that allows real-time conversation with visitors on your site, as well as a trouble ticket interface and FAQ database. You can access Help Center live from any computer with an internet connection, anywhere! This powerful tool allows true 24/7 customer support on your website for free!

Open Source Support Ticket System

The Support Logic Helpdesk is a script to provide an organized support platform for you and your clients. Support requests can be sent by email (if the email pipe got activated) and directly through the helpdesk via "tickets", which then can be processed by the staff members.

phpBB is a high powered, fully scalable, and highly customizable open-source bulletin board package. phpBB has a user-friendly interface, simple and straightforward administration panel, and helpful FAQ. Based on the powerful PHP server language and your choice of MySQL, MS-SQL, PostgreSQL or Access/ODBC database servers, phpBB is the ideal free community solution for all web sites.

Elegant. Effective. Powerful. Free. SMF is all of the above. SMF is a next-generation community software package and is jam-packed with features, while at the same time having a minimal impact on resources.

Its feature packed out-of-the-box installation allows store owners to setup, run, and maintain their online stores with minimum effort and with no costs involved.

Zen Cart truly is the art of e-commerce; a free, user-friendly, open source shopping cart system. The software is being developed by group of like-minded shop owners, programmers, designers, and consultants that think e-commerce could be and should be done differently.

CubeCart is an eCommerce script written with PHP & MySQL!

4images is a powerful web-based image gallery management system. Features include comment system, user registration and management, password protected administration area with browser-based upload, HTML templates for page layout and design, search engine and a lot more.

An Image Gallery system featuring categories and albums, thumbnails and intermediate size pics, search feature, new and random pictures, user management (private galleries, groups), user comments, e-cards feature, slide show viewer.

Gallery is a web based software product that lets you manage your photos on your own website. You must have your own website with PHP support in order to install and use it. With Gallery you can easily create and maintain albums of photos via an intuitive interface. Photo management includes automatic thumbnail creation, image resizing, rotation, ordering, captioning, searching and more. Albums can have read, write and caption permissions per individual authenticated user for an additional level of privacy. Give accounts to your friends and family and let them upload and manage their own photos on your website!

PHPauction provides a complete suite of applications and services for building auction web sites. PHPauction auction programs offer flexibility, power, and ease of use for small businesses and individuals.

Noah's Classified is an ad management system, that is an extremely powerful system with endless possibility to allow you to advertise whatever you want.

phpAdsNew is an open-source ad server, with an integrated banner management interface and tracking system for gathering statistics. With phpAdsNew you can easily rotate paid banners and your own in-house advertisements. You can even integrate banners from third party advertising companies.

PHProject is a modular application for the coordination of group activities and to share information and document via intranet and internet. Components of PHProject: Group calendar, project management, time card system, file management, contact manager, mail client and 9 other modules

PHP web-based project management framework that includes modules for companies, projects, tasks (with Gantt charts), forums, files, calendar, contacts, tickets/helpdesk, multi-language support, user/module permissions and themes.

Moodle is a course management system (CMS) - a software package designed to help educators create quality online courses.

WebCalendar is a PHP application used to maintain a calendar for a single user or an intranet group of users.

PHPlist is a web application that implements a personalized mailing list manager or customer relationship management (CRM) system. It is written in PHP and uses an SQL database for storing the information.

Advanced Poll is a polling system with powerful administration tool. It features: multiple polls, templates, unlimited options, multi-language support, IP-Logging, IP-Locking, cookie support, comment feature, vote expire feature, random poll support and more. Supports textfile and mySQL database.

phpESP is an effective, capable, web-based survey application that enables businesses to create complex and advanced surveys, view results in real time, and carry out advanced analysis.

Develop, publish and collect responses to surveys. Display surveys as single questions, group by group or all in one page or use a dataentry system for administration of paper-based versions of the survey. PHP Surveyor can produce 'branching' surveys (set conditions on whether individual questions will display), can vary the look and feel of your survey through a templating system, and can provide basic statistical analysis of your survey results.

PhpWiki is a web site where anyone can edit the pages through an HTML form. Linking is done automatically on the server side; all pages are stored in a database.

TikiWiki is designed to be an international, clean and extensible Content Management System and Groupware that can be used to create all sorts of web applications, sites, portals, intranets and extranets. TikiWiki also works great as a web-based collaboration tool. TikiWiki has a lot of native options and sections that you can enable/disable as you need them.

Open-Realty is a free easy to install, web content management solution, for real estate listings. Open-Realty uses PHP to drive a SQL backed, thus creating a tool which is fast and flexible. Open-Realty allows non-technical users to easily create and maintain realty listings on their website using a web browser.

phpFormGenerator is an easy-to-use tool to create reliable and efficient web forms in a snap. No programming of any sort is required. Just follow along the phpFormGenerator wizard and at the end, you will have a fully functional web form!

A full billing/invoicing application, perfect for web hosting resellers.

Unlimited categories/questions/answers, web-based administration.