One of the best, but not free at $14.95 per month.

Online version of Microsoft's popular CD-ROM. Highly recommended!

Specializes in North Africa and the Middle East.

An encyclopedia on mythology, folklore, mysticism, and more.

Students can access information on a variety of really cool subjects right from your computer. Especially useful for kids.

Encyclopedia of multicultural customs/culture. Dedicated in enhancing awareness towards cultural diversity and fulfilling human desire for mutual understanding.

A large dictionary and encyclopedia section on this reference site from Schackne Online