Events World Wide
Guide to arts, sports, entertainment, and special events around the world.
http://www.eventsworldwide.com/

Festivals.com
Searchable collection of events and parties around the world. Includes photos and festival search.
http://www.festivals.com/

Mofaim
Listings including venue information, where to buy tickets, and performer information.
http://www.mofaim.com/

US Festivals and Events
Listings for all U.S. states, including arts and crafts, music, and cultural festivals. Resources include festival vendor and entertainer listings, how to plan a festival, and tourism links.
http://festivalsandevents.com/