b2evolution is a powerful blog tool you can install on your own website, it includes all the features of traditional blog tools, and extends them with evolved features such as file & photo management, advanced skinning, multiple blogs support as well as detailed user permissions, not to mention third party plug-ins!

WordPress is a state-of-the-art semantic personal publishing platform with a focus on aesthetics, web standards, and usability. What a mouthful. WordPress is both free and priceless at the same time. More simply, WordPress is what you use when you want to work with your blogging software, not fight it.

Drupal is an open source content management platform equipped with a powerful blend of features, Drupal supports a variety of websites ranging from personal weblogs to large community-driven websites.

Geeklog is a PHP/MySQL based application for managing dynamic web content, it is a blog engine, or a CMS with support for comments, trackbacks, multiple syndication formats, spam protection, and all the other vital features of such a system.

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.

Mambo is a free, open source content management system (CMS), it is written and supported by volunteers whose commitment to the development of Mambo has seen it become one of the most popular applications on the Internet today.

PHP-Nuke is a news automated system specially designed to be used in Intranets and Internet. The Administrator has total control of his web site, registered users, and he will have in the hand a powerful assembly of tools to maintain an active and 100% interactive web site using databases.

phpwcms is an Open Source web content management system, 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.

phpWebSite provides a complete web site content management system. Web-based administration allows for easy maintenance of interactive, community-driven web sites. phpWebSite's growing number of modules allow for easy site customization without the need for unwanted or unused features.

PostNuke is software that creates an impressive, dynamic web site and provides the webmaster with a site they can administer with a minimal amount of HTML knowledge through a web browser.

SiteframeT is a lightweight content-management system designed for the rapid deployment of community-based websites. With Siteframe, a group of users can share stories and photographs, create blogs, send email to one another, and participate in group activities. Siteframe enables this by providing web-based content management so that anyone can create content without needing to learn HTML.

TYPO3.org is the main developer resource of the TYPO3 project, a free CMS framework released under the GPL. This site provides lots of information about creating sites, writing extensions and developing the core of TYPO3.

XOOPS is an extensible, OO (Object Oriented), easy to use dynamic web content management system 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.

Crafty Syntax Live Help (CSLH) is an open source live support solution that helps customer support with live help functionality that can be proactively pushed to visitors to your site or requested by the consumer. Crafty Syntax includes a large range of features to allow multiple operators, multiple departments and multiple languages to be used.

Help Center Live is a feature packed ticket and help desk system for effective management of client communications, easy to install and use, it can be a great help to running your business.

osTicket is a widely-used open source support ticket system. It seamlessly integrates inquiries created via email and web-based forms into a simple easy to use multi-user web interface. Easily manage, organize and archive all your support requests and responses in one place while providing your clients with accountability and responsiveness they deserve.

PerlDesk is a flexible, scalable and robust help desk and email software solution that empowers thousands of individuals, companies and organizations around the world. Using PerlDesk you can manage your incoming emails, web contact submissions and provide automated support solutions.

PHP Support Tickets - The powerful, all-in-one email helpdesk and ticketing software that is incredibly easy to use.

phpBBT has become the most widely used Open Source forum solution, with a large and highly customisable set of key features coupled with a standards compliant interface, phpBBT will grow with, and compliment your website. With millions of installations worldwide, it is no wonder phpBBT is one of the most popular ways to create and support a community.

Simple Machines Forum is a professional grade software package that allows you to set up your own online community within minutes. Its powerful custom made template engine puts you in full control of the lay-out of your message board and with the unique Server Side Includes function you can let your forum and your website interact with each other.

Zen CartT truly is a leading, user-friendly, open source shopping cart software. The ecommerce web site design program is being developed by group of like-minded shop owners, programmers, designers, and consultants that think ecommerce web design could be and should be done differently.

osCommerce is an Open Source based online shop e-commerce solution that is available for free under the GNU General Public License. It features a rich set of out-of-the-box online shopping cart functionality that allows store owners to setup, run, and maintain their online stores with minimum effort and with no costs, fees, or limitations involved.

CubeCart is a powerful eCommerce script written with PHP & MySQL. With CubeCart you can setup a powerful online store as long as you have hosting supporting PHP and one MySQL database.

FAQMasterFlex is a free, database-driven web-based application for creating and maintaining Frequently Asked Questions (FAQs) on your web site.

Coppermine is a multi-purpose fully-featured and integrated web picture gallery script written in PHP using GD or ImageMagick as image library with a MySQL backend.

Gallery, the open source web based photo album organizer. Gallery gives you an intuitive way to blend photo management seamlessly into your own website whether you're running a small personal site or a large community site.

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 and HTML templates for page layout and design.

phpLIST is an open-source newsletter manager. easy to use but with powerful features such as.. double opt-in subscription mechanism, scheduling, RSS, list segmentation, click-tracking, attachments and bounce management.

Soholaunch Pro Edition is a software product that makes it easy for people of all experience levels to create and maintain a great website. It reins-in the hard parts of building a website and presents them in a way that the non-geek can understand and control.