Blogs
b2evolution (website)
Nucleus (website)
pMachine Free (website)
WordPress (website)

Portals/CMS
Drupal  (website)
Geeklog   (website)
Mambo Open Source (website)
PHP-Nuke  (website)
phpWCMS  (website)
phpWebSite  (website)
Post-Nuke  (website)
Siteframe  (website)
Typo3  (website)
Xoops  (website)
Joomla  (website)

Customer Support
Crafty Syntax Live Help  (website)
Help Center Live  (website)
osTicket  (website)
PHP Support Tickets  (website)
Support Logic Helpdesk  (website)
Support Services Manager  (website)
PerlDesk  (website)

Discussion Boards
phpBB2  (website)
SMF  (website)

E-Commerce
CubeCart  (website)
OS Commerce  (website)
Zen Cart  (website)

FAQ
FAQMasterFlex  (website)

Guestbooks
ViPER Guestbook  (website)

Image Galleries
4images Gallery  (website)
Coppermine Photo Gallery  (website)
Gallery  (website)

Mailing List
PHPlist  (website)

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Advanced Poll (website)
phpESP  (website)
PHPSurveyor (website)

Project Management
PHProjekt  (website)
dotProject  (website)

Site Builder
Soholaunch Pro Edition  (website)
Template Express (website)

Wiki
PhpWiki (website)
TikiWiki  (website)

Other Scripts
Dew-NewPHPLinks (website)
Moodle  (website)
Noah’s Classifieds  (website)
Open-Realty  (website)
phpAdsNew  (website)
PHPauction  (website)
phpCOIN  (website)
phpFormGenerator  (website)
WebCalendar  (website)