World Bank Open Knowledge repository
It has been announced this week that the World Bank is providing free open access to many of its influential publications and reports from a single website - the open Knowledge repository. The World Bank covers a wide range of areas. Particularly useful are the world development reports, there is also coverage of economics, education, development and the environment.
The repository currently includes books, journals, and data - see the listing of key publications or search by title, subject keyword. Copyright information is displayed on the website. See the open access policy statement.
There is a separate data site which enables visualisations.