Open Source Projects with GPL-3.0 License
CoyIM
Secure chat client for XMPP
DomainMOD
Domain and hosting portfolio manager
Kontalk
Community-powered encrypted messaging
Omeka
Web publishing platform for libraries, museums and archives
Sentrifugo
Human resource management system for small businesses
Omeka S
Web publication system for institutions and collections
ILIAS
Large-scale learning management system for universities
e107
Free PHP and MySQL content management system
Nyxo
Open-source sleep tracker and coaching app
Subrion
PHP CMS for directories, classifieds and portals
Wolf CMS
Simple CMS with flexible per-page templates
Arastta
Modern e-commerce software built on Symfony components
SLiMS
Library management system
PluXml
Blog and CMS that stores content in XML
Nibbleblog
Small, fast blog engine that needs no SQL database
Traq
Project management and issue tracking
my little forum
Simple threaded PHP and MySQL forum
Open Monograph Press
Platform for managing scholarly book publishing
Mahara
Open-source ePortfolio system for learners
Gilfoyle
Distributed video encoding, hosting and delivery server
CubeCart
Free PHP e-commerce platform with no sales fees
Coppermine
Multi-purpose web photo gallery
Commentics
Comment system for websites
Open Preprint Systems
Platform for running preprint servers