http://www.idea.int/
Intergovernmental organization designed to provide knowledge for policy development and analysis to support democratic reform. Publications are free as downloadable pdfs.
http://www.keele.ac.uk/depts/por/mebase.htm
Valuable resource put together by the School of Politics, International Relations & the Environment at Keele University in the UK. The site is well maintained and updated regularly.
http://www.rand.org/topics/international-affairs.html
Provides research and analysis to facilitate policy decision making in both the public and private sectors includes security and military policy as well as social and economic policy.
http://www.electionstudies.org/
Collects data from the outcome of elections to provide researchers with a view of the political world through the eyes of ordinary citizens.
http://www.presidency.ucsb.edu/index.php
Online resource compiled by John woolley and Gerhard Peters at the University of California, Santa Barbara containing over 76,000 documents relating to the presidency.
http://www.cawp.rutgers.edu/
Features facts sheets, research, and voting behavior of women in goverment also facts about both current and historical women office holders.
http://library.albany.edu/subject/USCAM.HTM
Collects and provides links to various websites with information about American politics, elections and public opinions.