Digital Einstein Papers, an open access site with searchable full text copies of The Collected Papers of Albert Einstein, documentary and translation editions.
Albert Einstein Archives, The Hebrew University of Jerusalem holds Einstein’s original papers. AEA is the gateway for requesting reproductions and permissions.
Albert Einstein Image and Impact, a site maintained by the American Institute of Physics.
The Caltech Archives has photographs and letters related to Einstein's time spent at the California Institute of Technology.
Person of the Century: Albert Einstein, Time Magazine cover article for 31 December 1999.