Idealist, a project of Action Without Borders, is a site with 56,000 nonprofit and community organizations in 165 countries, which you can search or browse by name, location, or mission. Organizations can post job openings, volunteer opportunities, events, internships, campaigns, and resources in the knowledge that these postings will be seen by over 387,000 eager applicants. As they state in their mission:
"Action Without Borders connects people, organizations, and resources to help build a world where all people can live free and dignified lives.
Action Without Borders is independent of any government, political ideology, or religious creed. Our work is guided by the common desire of our members and supporters to find practical solutions to social and environmental problems, in a spirit of generosity and mutual respect."