
The Internet Public Library Associations On-line list. Very large, extensive list of associations in many fields.
The IFLANET, International Federation of Library Associations and Institutions. The global voice of the library and information profession.
The American Association of Association Executives has a large searchable list of on-line associations,
The Union of International Associations is a large database of international associations. Type in a keyword and you get a very long list. Includes a Who's Who Bibliography.
The Federation of International Trade Associations (FITA) "fosters international trade by strengthening the role of local, regional, and national associations throughout the United States, Mexico and Canada that have an international mission."
The Directory of Associations is a 5000 strong searchable database of business related associations around the world. You can even search by zip code.
The U.S. Government's Educational Associations and Organizations site. Help for students, teachers, librarians and researchers. Well done site with alot of help and information.