EasySocial
EasySocial is everything you need to start a social network in Joomla. EasySocial is best for enterprises and intranets.
EasyBlog
EasyBlog is a Joomla blog extension combining social media tools, integrates with Joomla templates and works with other Joomla extensions.
EasyDicuss
EasyDiscuss is the best question & answers extension for Joomla 1.5 and Joomla 2.5. It works like a forum or a discussions area for your Joomla website.
Kunena
Kunena is the leading Joomla forum component. Downloaded more than 3000000 times in nearly 5 years, Kunena is the Forum extension for Joomla!. Community forum, documentation, demo.
VirtueMart
Compatible with Joomla 2.5 and Joomla 3, the new generation of the eCommerce solution VirtueMart is now available with many new easing features
JomSocial
Open Source Social Networking Software. Award winning open source community software by JomSocial. This social networking software is widely used by numerous Joomla lovers all over the world.
Paycart
PayCart is a revolutionary Joomla! shopping cart software re-imagined for next generation online stores.
Community Builder
This book introduces some of the main features of Community Builder, the social networking platform for Joomla