b2evolution

B2evolution is a blog script featuring multiple blogs, categories/sub-categories, skins, search function, multiple languages, search engines friendly Urls.

nucleus

A powerful blog script featuring multiple blogs, multiple authors, drafts and future posts, bookmarklets.

pmachine

This is a feature limited version of pMachinePro.

wordpress

WordPress is a personal publishing tool with focus on aesthetics and featuring cross-blog tool, password protected posts, importing, typographical niceties, multiple authors, bookmarklets.

Content Management:

drupal

Drupal is an advanced portal with collaborative book, search engines friendly URLs, online help, roles, full content search, site watching, threaded comments, version control, blogging, news aggregator.

geeklog

Geeklog is a portal system with a wide range of modules.

JOOMLA

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.

Php-Nuke is one of the most popular community-based portals with a big choice of modules and languages.

phpwcms

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

Phpwebsite is a very powerful Content Management System with document manager, announcements, menu manager, photo album, block maker, FAQ, web pages maker, polls, information categorizer, calendar, link manager, form generator.

postnuke

Post Nuke is a content management system with focus on flexibility and security. A big variety of modules and blocks makes this CMS an all-round tool.

siteframe

Siteframe is a straightforward content-management system designed for rapid deployment of community-based websites. Nice-looking templates, oriented toward document-sharing, clean interface.

typo3

TYPO3 is a free Open Source content management system for enterprise purposes on the web and in intranets. It offers full flexibility and extendability while featuring an accomplished set of ready-made interfaces, functions and modules.

xoops

Xoops is a very popular advanced portal system.

Customer Relations:

Crafty Syntax Live Help is a Live Help chat system featuring monitor your visitors, proactively open a chat session, multiple chat sessions, referrer tracking, page view tracking, multiple operators, canned responses/images/URLs, multiple departments each with different icons, leave a message.

Help Center Live is a very powerful all-in-one help center including Live Help, Support Tickets and FAQ. Features include unlimited operators/departments, monitor visitors, initiate chat, collect visitor's information, track visitor's footprint, auto save chat transcripts, canned messages, leave a message, auto-assign tickets to operators, unlimited FAQ topics.

OsTicket is a Support Ticket system featuring email piping, pop3 login, unlimited email addresses, admin/staff/user panels, avoid auto responder loops, limit maximum tickets user can have opened, accept attachments and limit size, pager alerts for admin.

phpstickets

PhpTickets is a simple, one-admin Support Tickets system featuring self-registering, emailing to admin, attachments.

supportlogic

Support Logic is a support ticket system featuring multiple email addresses, admin/staff/user panels, canned responses, HTML tags support, email limit on a per user/day basis, attachments.

E-Commerce:

cubecart

CubeCart is an easy to use yet powerful shopping cart featuring unlimited categories and products, multiple payment gateways, downloadable products. The design is very easy to modify.

oscommerce

osCommerce is a powerful shopping cart with a big variety of modules and support of almost every payment gateway. A big developers community is ready to offer custom solutions depending on your needs.

zen cart

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.

faqmasterflex

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

Image Galleries:

4images

4images Gallery is an Image Gallery system featuring unlimited categories/subcategories, web-based and FTP images upload, auto-thumbnails, comments, send a picture, rate a picture, random pictures, extensive administration panel.

coppermine

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, slideshow viewer.

Polls and Surveys:

phpesp

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.

phpsurveyor

Develop, publish and collect responses to surveys. Display surveys as single questions, group by group or all in one page or use a data entry 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 template system, and can provide basic statistical analysis of your survey results.

Other Scripts:

dew-newphplinks

A Link Directory featuring categories, reviews, popular links, new links, links approval.

noahs classifieds

A classifieds system featuring categories and subcategories in unlimited depth, image upload for categories and classifieds, variable fields per categories, customizable email notifications, locking categories, classifieds approval, auto-thumbnail generation, classifieds management by user, send classified to a friend.

openrealty

Real Estate listing system featuring attachments, flexible search, template system, Yahoo Maps interface.

php adsnew

highly professional complete ad server featuring different types of ads, display based on keywords, zones, hour of the day, day of the week, extensive statistics, client statistics.

php auction

The GPL version of PHPauction featuring email notification of bids, attachments, reserve price, minimum bids, standard and dutch auctions, bid history, send auction to a friend, highest bids, auctions ending soon.