As I said in my original post, they actually do quite a bit of good. I'll quite a few figures that were released in the NY times.
$1 billion over 20 years to establish the Gates Millennium Scholarship Program, which will support promising minority students through college and some kinds of graduate school.
$750 million over five years to the Global Alliance for Vaccines and Immunization, which includes the World Health Organization, the Rockefeller Foundation, Unicef, pharmaceutical companies and the World Bank.
$350 million over three years to teachers, administrators, school districts and schools to improve America's K-12 education, starting in Washington State.
$200 million to the Gates Library Program, which is wiring public libraries in America's poorest communities in an effort to close the "digital divide."
$100 million to the Gates Children's Vaccine Program, which will accelerate delivery of lifesaving vaccines to children in the poorest countries of the world.
$50 million to the Maternal Mortality Reduction Program, run by the Columbia University School of Public Health.
$50 million to the Malaria Vaccine Initiative, to conduct research on promising candidates for a malaria vaccine.
$50 million to an international group called the Alliance for the Prevention of Cervical Cancer.
$50 million to a fund for global polio eradication, led by the World Health Organization, Unicef, Rotary International and the U.N. Foundation.
$40 million to the International Vaccine Institute, a research program based in Seoul, South Korea.
$28 million to Unicef for the elimination of maternal and neonatal tetanus.
$25 million to the Sequella Global Tuberculosis Foundation.
$25 million to the International AIDS Vaccine Initiative, which is creating coalitions of research scientists, pharmaceutical companies and governments in developing countries to look for a safe, effective, widely accessible vaccine against AIDS.
These numbers were taken from an article in the NY Times.