Flowlingo - Get fluent in a language through content immersion
SocialEngine - Socialengine PHP: Elevating Your Online Community Experience.
LabsLand - LabsLand lets students access real educational laboratories through the Internet.
JomSocial - Open Source Social Networking Software. Award winning open source community software by JomSocial. This social networking software is widely used by many Joomla users.
Backchannel Chat - Backchannel Chat is best in class discussion tool that is intended for teachers to streamline their class activities.
phpFox - phpFox is a powerful social network platform for niche communities