The following scripts are available with all Linux web hosting plans...
Blogs
b2evolution
A blog script featuring multiple blogs, categories/sub-categories, skins, search function, multiple languages, search engines friendly URLs. Homepage: http://b2evolution.net/
Nucleus
A powerful blog script featuring multiple blogs, multiple authors, drafts and future posts, bookmarklets. Homepage: http://nucleuscms.org/
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. Homepage: http://wordpress.org/
CMS - Content Management Systems
Drupal
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.
Homepage: http://drupal.org/
Joomla
Joomla is an award-winning content management system (CMS), which enables you to build Web sites and powerful online applications. Many aspects, including its ease-of-use and extensibility, have made Joomla the most popular Web site software available.
Homepage: http://www.joomla.org/
Geeklog
Geeklog is a weblog powered by PHP and MySQL. It allows you within minutes to set up a fully functioning dynamic website, and has many features to get you started. Homepage: http://www.geeklog.net/
Mambo
Open Source A professional level yet easy to use Content Management System featuring inline WYSIWYG content editors, newsfeeds, syndicated news, banners, mailing users, links manager, statistics, content archiving, date based content, 20 languages, modules and components. Homepage: http://mamboserver.com/
PHP-Nuke
One of the most popular community-based portals with a big choice of modules and languages.Homepage: http://www.phpnuke.org/
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. Homepage: http://www.phpwcms.de/
phpWebSite 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. Homepage: http://phpwebsite.appstate.edu/
Post-Nuke
A Content Management System with focus on flexibility and security. A big variety of modules and blocks makes this CMS an allround tool. Homepage: http://www.postnuke.com/
Siteframe
A straightforward content-management system designed for rapid deployment of community-based websites. Nice-looking templates, oriented toward document-sharing, clean interface. Homepage: http://siteframe.org/
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. Homepage: http://www.typo3.com/
e107
e107 is a portal or content management system powered by PHP and mySQL that gives you a totally dynamic and professional website out of the box.
CRM - Customer Relationship Management
Crafty Syntax Live Help
A Live Help chat system featuring monitor your visitors, proactively open a chat session, multiple chat sessions, referer tracking, page view tracking, multiple operators, canned responses/images/URLs, multiple departments each with different icons, leave a message. Homepage: http://www.cslh.com/
Help Center Live
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, autosave chat transcripts, canned messages, leave a message, auto-assign tickets to operators, unlimited FAQ topics. Homepage: http://www.helpcenterlive.com/
osTicket
A Support Tickets system featuring email piping, pop3 login, unlimited email addresses, admin/staff/user panels, avoid autoresponder loops, limit maximun tickets user can have opened, accept attachments and limit size, pager alerts for admin. Homepage: http://www.osticket.com/server/
PHP Support Tickets
A simple, one-admin Support Tickets system featuring self-registering, emailing to admin, attachments. Homepage: http://www.phpsupporttickets.com/
Support Logic Helpdesk
A Support Tickets system featuring multiple email addresses, admin/staff/user panels, canned responses, HTML tags support, email limit on a per user/day basis, attachments.
Homepage: http://www.support-logic.com/index.php
Discussion Boards
phpBB2
A widely-popular open-source bulletin-board package, works well, simple user interface and admin panel, clean look, scales well, and can be customized. Homepage: http://www.phpbb.com/
SMF Elegant
Effective. Powerful. Free. SMF is all of the above. SMF is a next-generation community software package and is jam-packed with features, while at the same time having a minimal impact on resources. Homepage: http://www.simplemachines.org/
E-Commerce
CubeCart 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. Homepage: http://cubecart.com/
OS Commerce
A power-user 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. Homepage: http://oscommerce.com/
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. Homepage: http://www.zen-cart.com/
Guestbooks
ViPER Guestbook The ViPER Guestbook is a high end guestbook script that is versatile, reliable, very comfortable and easy to use. The perfect choice for the ambitious webmaster ! Homepage: http://www.vipergb.de.vu/
AdvancedGuestBook Advanced Guestbook is a PHP-based guestbook script.
Image Galleries
4Images Gallery
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. Homepage: http://www.4homepages.de/
Coppermine Photo Gallery
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. Homepage: http://coppermine.sourceforge.net/
Gallery
An Image Gallery system featuring albums within albums, thumbnailing specific picture area, captions, rotate, reorder pictures, album-based attributes, album mirroring. Homepage: http://gallery.menalto.com/
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. Homepage: http://phpesp.sourceforge.net/
PHPSurveyor Develop, publish and collect responses to surveys. Display surveys as single questions, group by group or all in one page or use a dataentry 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 templating system, and can provide basic statistical analysis of your survey results. Homepage: http://phpsurveyor.sourceforge.net/
Project Management
dotProject
Project Management featuring companies, projects, tasks (with Gantt charts), forums, files, calendar, contacts, tickets/helpdesk, language support, user/module permissions, themes. Homepage: http://www.dotproject.net/
PHProjekt
Project Management featuring optional group system, privileges, calendar, contacts, time card, projects, chat, forum, request tracker, mail client, files, notes, bookmarks, to-do list, reminder, voting, language support. Homepage: http://www.phprojekt.com/
Site Builders
Soholaunch Pro Edition From basic, informational websites to robust e-business applications, this script vastly simplifies the creation and management of cutting-edge internet solutions. It installs at the end-users web site and empowers novices and seasoned developers alike with a streamlined development and management process unmatched by any other software product. Homepage: http://www.soholaunch.com/
Wiki
TikiWiki
TikiWiki is designed to be an international, clean and extensible Content Management System and Groupware that can be used to create all sorts of web applications, sites, portals, intranets and extranets. TikiWiki also works great as a web-based collaboration tool. TikiWiki has a lot of native options and sections that you can enable/disable as you need them. Homepage: http://www.tikiwiki.org/
PhpWiki
PhpWiki is a web site where anyone can edit the pages through an HTML form. Linking is done automatically on the server side; all pages are stored in a database. Homepage: http://phpwiki.sourceforge.net/
Other Scripts
Dew-New PHPLinks
A Link Directory featuring categories, reviews, popular links, new links, links approval. Homepage: http://www.dew-code.com/
Moodle
A Course Management System designed to help educators create quality online courses. Available in currently 34 languages, featuring WYSIWYG HTML Editor, teacher has full control over all settings for a course, flexible array of course activities (Forums, Journals, Quizzes, Resources, Choices, Surveys, Assignments, Chats, Workshops), user logging and tracking, mail integration and much more. Homepage: http://moodle.org/
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. Homepage: http://classifieds.phpoutsourcing.com/
Open-Realty
Real Estate listing system featuring attachments, flexible search, template system, Yahoo Maps interface. Homepage: http://www.open-realty.org/
phpAdsNew
A 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. Homepage: http://phpadsnew.com/
PHPauction
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. Homepage: http://www.phpauction.org/
phpFormGenerator
A form generator featuring up to 100 form fields, all kind of input fields incl. file upload, customizable fields attributes, send submitted data to an email address or store them in a database, admin panel. Homepage: http://phpformgen.sourceforge.net/