Mightybell - Build a community and a business on mobile
Discourse - Discourse is an open source discussion platform built for the next decade of the Internet.
MyTalk - Build a community around your product
GraphJS - Make any website social
Hey.Cafe - Hey.Café is a social network built around communities called cafés.
Visage - Visage is a new platform that enables non-designers to easily create beautiful, on-brand visual content such as data visualization, reports & much more