Richard Kimber's Political Science Resources 
http://www.psr.keele.ac.uk/ 
The best resource for British politics but also includes extensive world wide coverage coverage of political theory, manifestos, area studies, data archives, international relations. By Richard Kimber.

Online Resource Guide to Political Inquiry 
http://zeus.uwindsor.ca/courses/ps/dartnell/index.html 
Canada-based resource with extensive Directories in numerous areas including: Area Studies, International Studies, Issue based Politics, and Research and Reference. 

American Political Science Association
http://www.apsanet.org/ 
The website for the association features information on conferences, data and reports on the profession, discussion lists, and lists of grants. Discounted membership is available for students.

Brookings Institution
http://www.brookings.edu/ 
The Brookings Institution is a non-profit organization dedicated to researching U.S. policy issues both foreign and domestic. Their website offers analysis in articles, testimonies, opinions, and reports. These materials are searchable by using the keyword search textbox in the upper right-hand corner of the homepage. 

Political Resources on the Net 
http://www.politicalresources.net/
Provides links to Web pages of governments and political parties, as well as results of elections.