Here's the categorized list:
Content Management Systems (CMS):
- Drupal
- Xoops
- Concrete CMS
- CMS Made Simple
- ClassicPress
- Joomla
- WordPress (active)
- MediaWiki
- Composr CMS
- WonderCMS
- SuiteCRM
- Omeka S
- PHP-Fusion
- Tiki Wiki CMS Groupware
E-commerce Platforms:
- OpenCart
- CubeCart
Galleries:
- Gallery
- TinyWebGallery
- Piwigo
- Chevereto
Forum Software:
- Simple Machines Forum
- MyBB
- phpBB
Project Management Tools:
- Kanboard
- WeBid
Bug Tracking Systems:
- The Bug Genie
- Mantis
Customer Relationship Management (CRM):
- Vtiger
- OrangeHRM
Helpdesk Software:
- HESK
- osTicket
- Admidio
Others:
- Revive Adserver (Ad Server)
- Symfony (Web Application Framework)
- InvoicePlane (Invoicing Software)
- Form Tools (Web Form Builder)
- Code Igniter (Web Application Framework)
- Group Office (Groupware)
- webtrees (Genealogy Software)
- Coppermine (Image Gallery)
- Sales Syntax Live Help (Live Chat Software)
- Zend Framework (Web Application Framework)
- Podcast Generator (Podcast Publishing Software)
- LuxCal (Online Calendar)
- MyLittleForum (Simple Forum Software)
- Seo Panel (Search Engine Optimization Tool)
- Blesta (Billing Software)
- phpMyFAQ (FAQ Software)
- InvoiceNinja (Invoicing Software)
- Grav (Static Site Generator)
- Laravel (Web Application Framework)
- MODx (Content Management Framework)
- BlaB (Content Management System)
- Moodle™ LMS (Learning Management System)
- pH7Builder (Social Networking Platform Script)
- LibreBooking (Booking System)
- Open Web Analytics (Web Analytics Software)
- CE Phoenix Cart (E-commerce Platform)
- Tiny Tiny RSS (RSS Feed Reader)
- Traq (Groupware)
- phpMyAdmin (MySQL Administration Tool)
- LimeSurvey (Survey Software)
