Policy Archive compiles research and recommendations from think tanks, universities, government agencies and foundations into one browseable/searchable site. Designed to give the
non-wonk layperson free, centralized access to subject-specific information on public policy in the USA, Policy Archive offers quick links to topics like banking & finance, education, labor, and military. Or just browse by who wrote, published, or funded a given bit of research. 16,000+ documents and growing.
George Washington University's National Security Archive carries a collection of declassified US documents and articles on Saddam Hussein; Mexico, Cuba and other Latin American countries; Nixon's meeting with Elvis; the CIA and Nazi war criminals; etc.