Biodiversity Heritage Library

The Biodiversity Heritage Library (BHL) is a consortium of natural history and botanical libraries that cooperate to digitize and make accessible the legacy literature of biodiversity held in their collections and to make that literature available for open access and responsible use as a part of a global “biodiversity commons.”

For more information see http://www.biodiversitylibrary.org/.

Tools: 
http://biodivlib.wikispaces.com/Developer+Tools+and+API