Focused on UK researchers. "Currently this service and site are used for testing and validation of the in-development software prototype for the Names project. This service and site are not intended for use in live external applications or services except for experimentation as the availability, data and API are currently all subject to change." Not sure if whole data set is available.
Joint project of several national libraries plus selected regional and trans-national library agencies that matches and links library authority files. Service is currently free if you become a member of their consortium, and you need to apply to become a member by submitting test files. Brochure says the service will be freely available to all in the future. Could request permission to use. Might be more oriented to book authors.
Experimental repository for aggregating author identity information maintained by a variety of data providers. Has an initial focus on the mathematics and statistical communities. The website offers a 'developer' view of data and is not intended to be a primary interface to data. The website offers basic search, browse, and export capability. structWSF provides a RESTful API for importing data and creating applications that use the data.
Also other portions of the physical, social and mathematical sciences that are pertinent to the study of cognition.