Blog
  

B2 (Linux) or WordPress (Windows) allow you to easily add a news or blog system to your Web site. Use it for journals, discussions, news and more.

Find out more:
http://cafelog.com/
http://www.wordpress.com/
  

Customer Support Solutions / Live Chat
  

PHP Support Tickets (Linux) is a Web-based customer relationship and support solution that allows you to manage customer queries through a ticketing system.
Find out more:
http://www.phpsupporttickets.com/
  

Crafty Syntax Live Help (Linux) allows you to monitor visitors as they are browsing the site and proactively open a chat session with the visitor. You can monitor the Web pages that are being visited, chat with multiple clients at once in the same screen, and more.
Find out more:
http://craftysyntax.com/livehelp/
  

PHPOpenChat (Linux) lets you add a fully functional live chat system to your Web site. Use it for customer support or just to chat with others on the Web!

Find out more:
http://phpopenchat.org/
   

Discussion Boards
  

PHPBB (Linux and Windows) makes it easy to add a powerful discussion group or forum to your Web site. You can have an unlimited number of forums and categories with full user management, search and moderator capabilities.

Find out more:
http://www.phpbb.com/
  

E-commerce
  

OSCommerce (Linux) makes it easy to build profitable Web-based storefronts. It helps you manage product catalogs, prices, customer accounts, orders and shipping. Your storefront can even offer bestseller lists, customer product reviews and product recommendations.

Find out more:
http://www.oscommerce.org
  

Mailing List Announcement System
  

PHPlist (Linux) is a Web application that implements a personalised mailing list manager or customer relationship management (CRM) system. PHPlist is designed to assist you to stay in touch with your audience, without flooding them with information they don't want. PHPlist is an essential tool for anyone who is serious about creating, capturing and maintaining an offline audience, and will help you increase traffic to your Web site.

Find out more:
http://www.phplist.com/forums/index.php
  

Website Search Engine
  

PHPLinks (Linux) allows you to run an extremely efficient Link Farm with full search capabilities. In many ways, this application is like a "simulated" search engine. Other features include: multi-level site categorization, site ratings, link validation, category searching, and search term tracking.

Find out more:
http://sourceforge.net/projects/phplinks/
  

Online Calendar
  

Webcalendar (Linux) allows one or more persons to maintain an online calendar.

Find out more:
http://sourceforge.net/projects/webcalendar/
  

Photo Albums
  

With Gallery (Linux and Windows), you can easily manage and display your collections of images on your Web site. You can organize your pictures into albums, add captions, and create thumbnails. Gallery automatically keeps track of which pictures are most popular, and even lets viewers leave comments!

Find out more:
http://gallery.menalto.com
   

Portals and Content Management
  

PHPNuke and PostNuke (Linux) make it easy to build Web portals and communities. They manage news articles, discussion groups, blogs and more.

Find out more:
http://phpnuke.org/
http://noc.postnuke.com/
    

XOOPS (Linux) is the ideal tool for developing small to large dynamic community Web sites, intra company portals, corporate portals, weblogs and much more.

Find out more:
http://www.xoops.org/modules/news/
  

Web Form Management
  

FormMail (Linux) lets you get the results of forms on your Web site through email. Just post your form to FormMail and it will take care of the rest!

Find out more:
http://www.dtheatre.com/scripts/formmail