Europe

Belgian Java User Group
Includes membership information, articles, and information on previous events.
http://www.bejug.org/

Dublin Java User Group
Includes forum, calendar, and signup.
http://www.dubjug.org/

Java Special Interest Group (JSIG)
London and Dublin group; includes meeting history, mailing list information, and directions.
http://hermesjms.com/confluence/display/JSIG/Home

Java User Group of Kiev Polytechnic Institute (KPI)
Community of National Technical University of Ukraine users. Offers documentation and forum.
http://jug.org.ua/

Java User Group Stuttgart (JUGS)
Includes group summary in English, rest of information is in German.
http://www.jugs.de/

Java User Group Switzerland (JUGS)
Includes meeting history, bylaws, and group signup information.
http://www.jugs.ch/