For every day Congress is in session, Capitol Words visualizes the most frequently used words in the Congressional Record, giving you an at-a-glance view of which issues lawmakers address on a daily, weekly, monthly and yearly basis.
Grey literature exists outside of and is uncontrolled by the usual academic and commercial publishers. It includes conference proceedings, occasional and working papers, policy papers and briefs, hearings, reports, and more.
Think Tank Search
A Google Custom Search for think tanks from the Kennedy School at Harvard.
Open Think Tank Directory
A global collection of think tanks and related organisations
Collects and archives public policy research publications from US think tanks.
NIRA World Directory of Think Tanks
Indexed by country with descriptions, contact information, and links to organizations' website
WWW Virtual Library: Research Institutes-- list of think tank-related links and resources maintained by Wayne Selcher at Elizabethtown College