Gapminder World and Gapminder Countries are web-services displaying time series of development statistics for all countries, "converting boring numbers into enjoyable, animated and interactive graphics."
A digital library of public domain and in copyright digitized works. HathiTrust is a partnership of major research institutions and libraries working to preserve and make accessible the cultural record.
"Immigration to the US, 1789-1930 is a web-based collection of selected historical materials from Harvard’s libraries, archives, and museums that documents voluntary immigration to the United States from the signing of the Constitution to the onset of the Great Depression. For Internet users worldwide, Immigration to the US provides unparalleled, free and open digital access to a significant selection of unique source materials—more than 410,000 pages, 100 individually cataloged maps, and 7,800 photographs."
"Established in 1968 by Mrs. Coretta Scott King, The Martin Luther King, Jr. Center for Nonviolent Social Change ("The King Center") has been a global destination, resource center and community institution for over a quarter century. "
Provides definitions for terms used in sociology, criminology, political science, and women’s studies. Product of Athabasca U., Canada, and the Intl. Consortium for the Advancement of Academic Publication (ICAAP).
"States Perform provides users with access to interactive, customizable and up-to-date comparative performance measurement data for 50 states in six key areas: fiscal and economic, public safety and justice, energy and environment, transportation, health and human services, and education. " From the Council of State Governments.
The World Bank eAtlas of Global Development maps and graphs more than 175 thematically organized indicators for over 200 countries, letting you visualize and compare progress on the most important development challenges facing our world. Most indicators cover several decades, so you can see, for example, how "life expectancy at birth" has improved from 1960 up through the latest year.