Memory Alpha is a collaborative project to create the most definitive, accurate, and accessible encyclopedia and reference for everything related to S...

Continuum - Meet people from all over the world...then kill them.

Comprehensive encyclopedia of mathematics with 13,000 detailed entries. Continually updated, extensively illustrated, and with interactive examples.

The Khan Academy is a not-for-profit 501(c)(3) with the mission of providing a world-class education to anyone, anywhere. Despite being the work of o...

Star Wars movies, characters, and spin-offs are catalogued in Wookieepedia, a comprehensive database that anyone can edit.

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 fr...