Digital Librarian - Links to many activist resources. - http://www.digital-librarian.com/activism.html
Activism.net - Resources for activists and progressive thinkers, including Peace, Privacy, and the Environment. - http://activism.net
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