http://www.mozilla.com/en-US/thunderbird/
http://www.zindus.com/
http://lifehacker.com/software/download-managers/geek-to-live--wget-local-copies-of-your-online-research-delicious-digg-or-google-notebook-200360.php
http://lifehacker.com/399407/how-to-sync-any-desktop-calendar-with-google-calendar
http://gears.google.com/
offlineimap @ slashdot.org
http://www.nabber.org/projects/cloudexport/