<ul>
<li><a href="http://www.usenix.org/events/">Usenix - Events Calendar</a>
<li><a href="http://www.guug.de/kalender/">GUUG - Kalender</a>
-<li><a href="http://europa.eu.int/ISPO/ida/jsps/index.jsp?fuseAction=showChapter&chapterID=472&preChapterID=null-452">EU - Open Source Events</a>
<li><a href="http://www.pl-forum.de/cgi-bin/plcal/index.cgi">Pro-Linux</a>
<li><a href="http://www.linuxcalendar.com/">LWN Community Calendar</a>
<li><a href="http://www.linuxwochen.at/">Linuxwochen Österreich</a>