CESSDA provides large scale, integrated and sustainable data services to the social sciences, having evolved from a network of European data service providers into a legal entity and large-scale infrastructure under the auspices of the European Strategy Forum on Research Infrastructures (ESFRI) Roadmap.CESSDA provides a seamless interface to datasets from social science data archives across Europe.

Eurostat is the statistical office of the European Union and its homepage offers a whole range of data that governments, businesses, the education sector, journalists and the public can use for their work and daily life. The data covers following themes: - General and regional statistics - Economy and finance: National accounts (including GDP), ESA Input-Output tables, European sector accounts, Pensions in National Accounts, Government finance and EDP, Exchange rates, Interest rates, Harmonised Indices of Consumer Prices (HICP), Housing price statistics, Purchasing Power Parities (PPPs), Balance of payments - Population and social conditions - Industry, trade and service: Manufactured goods (Prodcom), Postal services, Structural business statistics, Short-term business statistics, Tourism - Agriculture and fisheries - International trade - Transport - Environment and energy - Science and technology

Google Book Search is a service from Google that searches the full text of books that Google scans, converts to text using optical character recognition, and stores in its digital database.

Histat serves as access-platform of time series data collected in the framework of economic and social historical research.All together, all in the database Histat contained time series enclose about five and a half million values. From the year 1800 at least thousand values for nearly each year are available, from the middle of the 19th century there are already more than 10.000 values on hand via Histat, and with the foundation of the German Empire (in 1871) there are more than 20.000 values available per year. The highlights are the years at the beginning of the 20th Century: for several years there are about 60.000 values available via histat.

The International Monetary Fund's eLibrary simplifies analysis and research with direct access to the IMF's periodicals, books, working papers and studies. Various statistical and visualization tools to showcase IMF datasets are offered free of charge via the IMF Data platform.

MIA contains the writings of 592 authors representing a complete spectrum of political, philosophical, and scientific thought, generally spanning the past 200 years. Being a communist means working for the self-emancipation of the working class; it means striving to unite the working class, in all its diversity, in the struggle to overthrow capitalism. In the 1840s, Marx and Engels placed communism on a scientific footing through the theory of dialectical materialism. Marxists are those who have continued this ever since. If any one of the following criteria apply, the MIA Collective may decide to place the writer into the Reference Archive: (i) they pre-date Marx and Engels, (ii) they specifically reject Marxism, (iii) their work is practically and theoretically unconnected or hostile toward the workers movement, (iv) their work is idealistic or lacking in dialectic. Where a writer contributes to Marxist theory and practice for a part of their life, while other works lie outside of Marxism, then the whole of their writing will be placed in the Marxist Writers' Archive.Contains: Karl Marx/ Friedrich Engels - Werke ; Rosa Luxenburg; August Bebel; Antonio Gramsci ...

The Max Planck e-Book Index provides holdings of electronic books licensed for users in the Max Planck Society.

A collaborative effort of the Networked Digital Library of Theses and Dissertations (NDLTD), OCLC, VTLS, and Scirus, the NDLTD Union Catalog contains more than one million records of electronic theses and dissertations. For students and researchers, the Union Catalog makes individual collections of NDLTD member institutions and consortia appear as one seamless digital library of electronic theses and dissertations.

Project Gutenberg is a volunteer effort to digitize and archive cultural works. Founded in 1971 by Michael Hart, it is the oldest digital library. Project Gutenberg's mission is "To encourage the creation and distribution of eBooks".

RePEc is a collaborative effort of hundreds of volunteers in 73 countries to enhance the dissemination of research in economics. The heart of the project is a decentralized database of working papers, journal articles and software components. All RePEc material is freely available.