Other Voices [ http://www.other-voices.net ]
Global access to the web allows individuals or small groups with unconventional viewpoints to reach huge audiences. Many such individuals and groups have created websites to put out their messages and promote their causes. The Other Voices Directory of Dissent can serve as a guide to these minority views.

Gap Years [ http://www.charitableactions.com ]
Charitable Actions lists charities, gap years, grants and volunteering opportunities to help people do good in the world.