Greeneland
http://members.tripod.com/~greeneland/
Borrowing its title from the critical shorthand for Greene's world of espionage and moral angst, this is a nicely put-together fan site. Includes information on A Burnt-Out Case and many more of Greene's novels.
Graham Greene Birthplace Trust
http://www.grahamgreenebt.org/
An organization devoted to educating students and readers about Greene's works.
American Leprosy Missions
"Celebrating over 100 years of service, American Leprosy Missions (ALM) is the oldest and largest organization in the United States devoted to restoring the lives of people affected by leprosy and related conditions worldwide through holistic cure and care."