Articles + Catalog
Articles+ - similar to Google Scholar, but with more content.
Military & Government Collection - focused on miltary journals.
More databases - a list of databases by subject area.
Policy Reports and Documents
Think Tanks Directory - a Google search that is limited to the sites of major think tanks (from the Harvard Kennedy School of Government).
Congressional Research Service Reports - Select CRS and SerialSet from the "Limit to" menu.
USA.gov - Searches federal government agencies, military sites and state government sites.
Military Education Research Library Network (MERLIN) - Provides U.S. Government policy statements on selected key topics, accompanied by additional resources that analyze the topic.
Digital National Security Archive - Important primary source materials relative to U.S. foreign policy since 1945.
Google International Organizations Search - Search across dozens of non-governmental and inter-governmental organizations.
TheMacroDataGuide - Search for data by country and topic.
UNdata - Provides access to 14 statistical databases from the UN and other international organizations. Includes agriculture, education, energy, industry, labor, national accounts, population, tourism and trade.
WDI Online (World Development Indicators from the World Bank) - Major source for data on the global economy, offering statistics on over 550 development indicators from over 200 countries from 1960 to present.
OECD iLibrary (Organisation for Economic Co-operation and Development) - Covers an enormous variety of economic and social indicators, especially for OECD member countries. Search by theme or country.