Ning is a social networking infrastructure site. Ning is an online platform for users to create their own social websites and social networks[2], launched in October 2005[1]. Ning was co-founded by Marc Andreessen and Gina Bianchini. Ning is Andreessen's third startup (after Netscape and Opsware), and gets much of its notability from Andreessen's successes with those companies.[3][4] * Wikipedia:Ning