Open Source Projects in PHP
Monstra
Fast, small CMS for small business websites
Claroline
Collaborative learning environment for courses and teams
openSIS
Student information system for K-12 and higher education
X2CRM
Open-source CRM with sales and marketing tools
e107
Free PHP and MySQL content management system
UNA
Community management system for social sites, forums and marketplaces
Zenphoto
Gallery and CMS for photographers
Webasyst
PHP framework and app platform for small business tools
LibreHealth EHR
Free electronic health records system
EGroupware
Groupware server for email, calendar, contacts and projects
Group Office
Groupware and CRM for small and mid-size teams
Subrion
PHP CMS for directories, classifieds and portals
osCommerce
Long-established open-source online shop software
OpenDocMan
Free PHP document management system
Wolf CMS
Simple CMS with flexible per-page templates
Arastta
Modern e-commerce software built on Symfony components
SLiMS
Library management system
Zikula
Web application toolkit and modular CMS
PluXml
Blog and CMS that stores content in XML
Typesetter
Lightweight flat-file CMS with true WYSIWYG
Serendipity
Extensible PHP weblog engine with a plugin ecosystem
Nibbleblog
Small, fast blog engine that needs no SQL database
FlatPress
Flat-file blog that stores posts as plain text
dotProject
Project management for teams and clients