GReat Images in NASA - GRIN
GRIN is a collection of over a thousand images of significant historical interest scanned at high-resolution in several sizes. This collection is intended for the media, publishers, and the general public looking for high-quality photographs. Please note that downloading these image files may take some time, although searching and browsing should be relatively quick.
JSC Digital Image Collection
This collection of more than 9000 NASA press release photos spans the American manned space program, from the Mercury program to the STS-79 Shuttle mission.