Directories

Digital Librarian - Links to many activist resources.
http://www.digital-librarian.com/activism.html

Protest.Net - Helps people find out about progressive protest, meetings, pickets, strikes, demonstrations, and conferences around the world by providing a central calendar where the times and locations can be posted.
http://www.protest.net

Activism.net - Resources for activists and progressive thinkers, including Peace, Privacy, and the Environment.
http://activism.net

The Armchair Agitator - For people who care about human rights, the environment, and other progressive issues but don't have time to be full-time activists. Regularly updated links to organizations with online resources that make it easy to get involved.
http://www.geocities.com/bulgybear/agitator.html