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.
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.
Douban is a Chinese social networking website. The website was established on March 6, 2005 by Yang Bo. The website starts with a book and audio, and provides information about books, movies, music, and other works.
LiveJournal is a virtual community where Internet users can maintain a blog, a newspaper or a diary. Each user has a profile with which to interact with communities and other users. The standard service is free but there is also the possibility to upgrade to premium account.
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.