Downloads: gCalCron Automates Your Linux System with Google Calendar
gcalcron allows you to issue terminal commands to a computer through Google Calendar.
run terminal commands in ubuntu using cron and scheduled by google calendar
Nice is a tad insecure (well as secure as your google account!)How to Sync Facebook Events with Google Calendar
For those out there who use Google and Facebook to manage events and calendaring, here’s another how-to that might not only make your busy lives a little less complicated, but will relieve you of the pain of having to keep up between multiple calendars.
facebook tech tipFeatured Download: Google Calendar Desktop Gadget Released
Windows/Mac/Linux (All platforms): Google Desktop's gadgets are looking more helpful these days, with the addition of an official Google Calendar gadget that puts your appointments at your fingertips.