David Sarnoff Library
The David Sarnoff Library is dedicated to the history, understanding, and promotion of innovation in science and engineering for the benefit of humanity. The Collection archives, exhibits, and makes available documents, images, and artifacts related to Mr. Sarnoff’s career in the electronics and communications industries, and to the breakthrough technologies pioneered at the David Sarnoff Research Center. Together with other educational, scientific, and technical organizations, it hosts events and programs related to the processes of invention and innovation.
http://www.davidsarnoff.org

Institute and Museum of History of Science - Florence, Italy
The museum and web site are particularly rich resources for the life and work of Galileo.
http://galileo.imss.firenze.it/

Museum of the History of Science, University of Oxford
Library calalog, image library, and numerous virtual exhibits available online.
http://www.mhs.ox.ac.uk/

ASAPWeb - Australian Science Archives Project
Aims to improve access to Australia's scientific, technological and medical heritage by helping to preserve records and artifacts and communicating the existence of this heritage to a wide audience.
http://www.asap.unimelb.edu.au/

History of Science Society
Dedicated to fostering interest and scholarly research in the history of science and its social and cultural relations. Site informs about the profession, teaching and research efforts, and society activities.
http://www.hssonline.org/