GoPad for Schools - School Management
SocialEngine - Socialengine PHP: Elevating Your Online Community Experience.
Tuio - Tuio is a billing and payment application that allow daycare centers and pre-schools to centralize and manage all parent billing and payment in one place.
phpFox - phpFox is a powerful social network platform for niche communities
Yusp - Yusp is a next generation, real-time personalization engine having all product modules as defined by Gartner for various business models.
BuddyPress - WordPress social networking in a box.