A resource providing documents in US History from the 1600s to present day. The overwhelming majority of these primary sources are presidential speeches/inaugural adresses and famous supreme court cases.
These is a website that provides quality educational resources. This website directs you to primary source documents that can be used for various activities or lessons. You can also buy various materials for teaching which are categorized by subjects.
These archives from Yale Law School include links to various primary source documents from the September 11 terrorist attacks. The Avalon Project gathers various documents dealing with Law, History and Diplomacy which could be very useful when discussing history, or current events.