If you’ve ever logged into a website through Facebook Connect, Charlie Cheever is one of the people you can thank. The former Facebook engineer paired up with former Facebook CTO Adam D’Angelo to co-found Quora, a social forum with content that is decidedly more intellectual — some would say interesting — than many of the things users post on Facebook.
 
Quora is a Q&A site that requires real, identified users to ask and answer questions. You can follow people, questions, topics, and boards, gaining knowledge while establishing new social connections. By requiring identification, Quora adds accountability and networking opportunities to the old anonymous format. Instead of wrangling trolls, users are pleasantly surprised by new insights. And where else can you see questions answered by online celebrities? Jimmy Wales of Wikipedia fame, for example, recently answered a question about teaching kids to play chess.