Renren is a Chinese social networking website. In August 2009, Xiaonei Network officially changed its name to Renren with as domain name www.renren.com.
Quora is a question-and-answer website, where people can ask questions, give answers and can also change it. It has been published by Quora Inc., whose headquarters is located in Mountain View, California.
Odnoklassniki is a Russian social networking website owned by Mail.Ru Group. The website currently has more than 200 million registered users and 45 million daily unique visitors.