Review for Provider for Google Calendar by damiankrol
Rated 5 out of 5 stars
For Thunderbird 3.0 use nightly: http://ftp.mozilla.org/pub/mozilla.org/calendar/lightning/nightly/latest-comm-1.9.1/win32-xpi/
This review is for a previous version of the add-on (0.5.5).To create your own collections, you must have a Mozilla Add-ons account.