Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to keep up with friends, upload an unlimited number of photos, post links and videos, and learn more about the people they meet.

Yahoo! Answers is a new way to find and share information. You can ask questions on any topic, get answers from real people, and share your insights and experience.

tos / wiki · memberlist · usergroups ...

A Music Enthusiast Resource & search directory with person to person online community features.

Scribd is a social publishing site, where tens of millions of people share original writings and documents. Scribd's vision is to liberate the written word.

Online math help: review lessons, homework help, learning aids, games, puzzles and test preparation (eg SAT) for kids, teens, schools, home schools, teachers, parents and educators in mathematics.