Portals/CMS

• PHP-Nuke
• Post-Nuke
• phpWebSite
• Xoops

Blogs (weblogs)

• b2 Blog
  A classy news/weblog tool (aka logware).
  
• pMachine Free
  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.

Customer Service

• CS Live Help
  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 eiter text based database or Mysql database, chat notification, user is typing message, multiple chat sessions and multiple operators
  
• PHP Support Tickets
  An application which allows you to offer your web site users a way to request Support Tickets. Through the admin side of the application you can set up user accounts. These Users may then log into the Client side and write any amount of requests to the system. On submitting a request the request is emailed to the Administrator's email specified within the Config file.
  
• Support Services Manager
  SSM is your complete support desk, knowledge base management, and customer relations management solution!

Discussion Boards

• phpBB2
  phpBB is a high powered, fully scalable, and highly customisable 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
  
• Invision Board
  Our award-winning forum software and communications portal used on countless thousands of web sites across the Internet. Invision Power Board is a fast and secure forum software solution for the personal or corporate user, brought to you by authors and support staff with several years of forum coding experience. This fast and reliable forum solution all comes at no cost to you.

E-Commerce

• OS Commerce
  osCommerce is an online shop e-commerce solution under on going development by the open source community. Its feature packed out-of-the-box installation allows store owners to setup, run, and maintain their online stores with minimum effort and with absolutely no costs or license fees involved.
  
• AgoraCart
  (aka agora.cgi ) is an open source e-commerce solution with numerous users, paid and free add-ons and hacks. "Mister Ed" at K-Factor Technologies, Inc. is the current principle of this project as of July 2002. This project originally started with Steve Kneizys' modular concept of the shopping cart ( agora.cgi version 3.0 ) and is gradually becoming known as AgoraCart (version 4.0j_beta and above) with the addition of many user tools and add-ons.
  
• Noahs Classifieds
  A complete classified ads system with unlimited categories and subcategories.
  
• PHPauction
  provides a complete suite of applications and services for building auction web sites. auction programs offer flexibility, power, and ease of use for small businesses and individuals. We can provide an integrated set of scripts that will assist in building successful web sites and increase business and sales.

Mailing Lists

• Mailman
  Interactive list software complete with web based user control panel and online archives.
  
• PHPlist
  Mailing list for one way broadcast messages like announcements etc.

Other scripts

• 4images Gallery
  4images is a powerful web-based image gallery management system. Features include comment system, user registration and mangagement, password protected administration area with browser-based upload, HTML templates for page layout and design, search engine and a lot more. 4images is free for private and non-commercial use.
  
• PHProjekt (Groupware)
  Groupware that includes a Calendar, Contact Manager, Time Card System, Project Management, Chat Room, Forum, Help Tickets, Download Manager, bookmark manager and much more.
  
• phpLinks
  Link Library for your site.
  
• Moodle E-Learning
  Moodle is a course management system (CMS) - a software package designed to help educators create quality online courses. Such e-learning systems are sometimes also called Learning Management Systems (LMS) or Virtual Learning Environments (VLE). One of the main advantages of Moodle over other systems is a strong grounding in social constructionist pedagogy.
  
• WebCalendar
  WebCalendar is a PHP application used to maintain a calendar for one or more persons.
  
• HTML/Java Chat Rooms
• phpMyChat
• CGI Wrapper
• Random HTML Generator
• Simple Guestbook
• Advanced Guestbook
• Counter
• Clock
• Countdown
• FormMail Clone
• cgiemail
• EntropySearch
• EntropyBanner