InvisionBoard is a web bulletin board system.

PHP-Nuke is an advanced content management system.

osCommerce is an easy to use and configure shopping cart system.

PostNuke is an advanced weblog/Content Management System (CMS).

XOOPS is a dynamic OO (Object Oriented) based open source portal script written in PHP.

phpWebSite provides a complete web site content management solution.

A PHP/MySQL-driven powerful and flexible web-based auction system that offers a powerful admin back-end section to configure and administrate the site.

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.

phpBook is a PHP/MySQL guestbook program.

Higly customizable classified ad application that allows users to post advertisements to unlimited categories.

b2 is a set of scripts designed to ease the process of publishing news to your homepage, or weblog.

phpAdsNew is an open source ad server.

Manage web projects with team collaboration, users management, tasks and projects tracking, files approval tracking, project sites clients access, customer relationship management (Php / Mysql, PostgreSQL or Sql Server).

4images is a powerful web-based image gallery management system.

pMachine is publishing software which you can use to create everything from a simple weblog to a multi-layered interactive news site.

Advanced Poll is a polling system with powerful administration tools.

The OneOrZero Helpdesk is an extremely powerful, yet lightweight, helpdesk package.

Aardvark Topsites PHP has all the features you will ever need

WebCalendar is a PHP application used to maintain a calendar for one or more persons.

paFileDB lets you easily have a database of downloads on your website.

PhpDig is a very small PHP search engine that uses a MySQL database on backend.

phpLinks is a free and Open Source PHP script that allows you to run a very powerful link farm or search engine simulation.

PHPlist is a web application that implements a personalised mailing list manager or customer relationship management (CRM) system.

phpMyFAQ is a multilingual, completely database-driven FAQ-system.

Manage customer queries with this one stop solution for online customer relations.

EasySite is a content management system whereby any person, organization, or company can have a website up in minutes, provided that PHP and MySQL are operational on the server. You should also be able to create and modify tables in MySQL (or know someone who can!). Once the MySQL tables are created and the web files are uploaded to the server, anyone with admin access will be able to login and change any aspect of the website - text graphics, template areas (e.g. site header & footer), and more! The interface is fully customizable by tweaking a stylesheet and by setting a few variables in the configuration file.

Dada Mail is an intuitive, web-based e-mail list management system, which runs on any hosting account that can execute custom CGI scripts.

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!

Paintboard is one of the most exciting PHP scripts created by Obie. You can draw Dynamically on the web, save to Galery, open exiting documents. On Galery, you or visitors can view, vote, send comments, open randomize topics....And it uses a safety mode, no one can flood your online Galery.

Open-Realty is a free, open source real estate listing manager. Intended to be both easy to install and easy to administer, Open-Realty uses PHP to drive a mySQL backend, thus creating a tool which is fast and flexible.

SubmitForce is an open source searchengine submission class. Very customizable and easy to use. Its FREE.