Searchable directory of 16,000+ nonprofit and volunteer organizations worldwide, plus news, events and more.
Browsable directory including a calendar of meetings based on information stored in the database used to create the Yearbook of International Organizations from the Union of International Associations.
Collection of links to scholarly societies worldwide; see also the Meeting/Conference Announcement Lists from the Scholarly Societies Project.

This site offers a free searchable index to future conferences, congresses, meetings and symposia.
Includes National Organizations of the U.S., International Organizations, and Regional, State and Local Organizations of the U.S. Updated annually.