Idealist - Action Without Borders
Over 37,000 nonprofit and community organizations in 165 countries, which you can search or browse by name, location or mission. If your organization is not yet listed here, you can add it now (it's free). Thousands of volunteer opportunities in your community and around the world, and a list of organizations that can help you volunteer abroad. The best Nonprofit Career Center on the Web, with hundreds of job and internship listings.