chime in

Chime.in was a social networking service and Web site launched in October 2011, operated and privately owned by UberMedia. Unlike most social networks, Chime.in is organized around subjects instead of people. The website is designed as a place to learn and share with other people who have similar interests. Chime.in lets users share content with others through a number of different mediums. It has a newsfeed, profile pages and a system for following other users.