GreatFolder.com links to global website with many listing and categories such as artist, business, advertising, real estate, fashions, health, hobbies, recreation and sports, entertainment and games.
The Art Register, International register of art dealers and related professions. http://www.artregister.com/
True Art Directory of publications, corporations, and links. Includes information on artist materials, the creative process, and exhibitions. http://www.trueart.info/
