Charity Choice  
   Encyclopedia of British charitable organizations in 27 categories in a fully searchable database.
   http://www.charitychoice.co.uk/

Charity Guide  
   Searchable database of United States nonprofits. Website also features donation guide, procedures by which organizations can be listed.
   http://www.charity-charities.org/

Charity Portal UK  
   Searchable directory of UK charities. Charities listed by type, discussion forum and donation by click.
   http://www.charityportal.org.uk/

CharityAmerica.com  
   An online "village" that unites donors, volunteers, businesses, and qualified charities from across the nation.
   http://www.charityamerica.com

CharityEzone  
   Portal for researching non-profit groups in the US; includes links to news and ratings sites, venture philanthropy information, and gateway to search the IRS database.
   http://www.charityezone.com/

International Volunteer Programs Association  
   A comprehensive search and information site for international volunteer opportunities.
   http://www.volunteerinternational.org

Volunteer Solutions  
   Find the perfect volunteer opportunity online. Has opportunities for a few major American cities.
   http://volunteersolutions.org/

CharityGuide.org  
   A directory site for people who want to contribute to society but need ideas or motivation.
   http://charityguide.org/