Mozilla Lightning:
http://www.mozilla.org/projects/calendar/lightning/download.html

Funambol Mozilla PIM plugin:
http://sourceforge.net/project/showfiles.php?group_id=149326

direct-link to v0.3.2:
http://dfn.dl.sourceforge.net/sourceforge/sync4jmozilla/Funambol-Pim-Plugin-win32-v0.3.2.xpi