CIA - The World Factbook: European Union - https://www.cia.gov/library/publications/the-world-factbook/geos/ee.html Features map and brief descriptions of the geography, people, government, economy, communications, transportation, military and transnational issues.
EU-ABC - http://www.euabc.com A detailed dictionary of the EU, updated frequently.
EU Information Centre - http://www.euo.dk/euo_en/ Information from the Danish Parlament.
Wikipedia - Wikiportal: European Union - http://en.wikipedia.org/wiki/Wikipedia:Wikiportal/European_Union Starting point for encyclopedia categories and articles setting out the EU's history, membership, institutional structure and main policy areas.
Europe Direct - http://ec.europa.eu/europedirect/ Details on the general information service of the EU Institutions: for any EU-related query, call the toll-free number within the EU, write an email or send a web assistance request.
Europa - http://europa.eu/ Official portal to the European Union with news and information about its activities, institutions, policies and programs.
European No Campaign - http://www.europeannocampaign.com/ A EU-wide cross party network of organizations and individuals, that work together to stop the proposed EU Constitution. Find the latest news, background information, and a time table. Multilingual site.
Your Europe - http://ec.europa.eu/youreurope/ Site devoted to the rights of the citizens of the Union.