The Turing Digital Archive is an excellent collection of digitized facsimiles of historical source material from one of the pioneers of modern computing, Alan Turing. The archive is OAI-MHP compliant, and thus searchable through OAIster and other Open Archives Initiative metadata repositories.
Quoting from the cover page:
This digital archive contains mainly unpublished personal papers and photographs of Alan Turing from 1923-1972. The originals are in the Turing archive in King's College Cambridge.
It contains letters, obituaries and memoirs written by colleagues and used by Sara Turing for her biography of her son (Heffers: Cambridge, 1959); talks and publications on the Automatic Computing Engine, his work at the National Physical Laboratory, the theories of computable numbers, digital computers, morphogenesis and the chemical development of cells.
Posted by
George Porter at 8/24/2004 07:49:00 PM.
The open access movement:
Putting peer-reviewed scientific and scholarly literature
on the internet. Making it available free of charge and
free of most copyright and licensing restrictions.
Removing the barriers to serious research.
I recommend the OA tracking project (OATP) as the best way to stay on top of new OA developments. You can read the OATP feed on a blog-like web page or subscribe to it by RSS, email, or Twitter. You can also help build the feed by tagging new developments you encounter.