Windows only: System tray application GMinder gives you quick offline display of multiple Google Calendars—and even alerts you of upcoming appointments. The application was created by reader Greg Todd, who wrote the application for his own use—but decided to release it for the rest of us to enjoy. Using the application is simple—just enter in your Google account information, click the Download button to get your list of calendars, and then select the ones you want to display. The only small issue is that Windows Vista users will need to select a different sound file in the options panel since the default one doesn't exist on Vista—a small price to pay for an excellent application that bridges the gap between Google Calendar and your Windows desktop. Thanks, Greg! GMinder is free and open source, available for Windows only. Google Desktop users can also check out the powerful Google Calendar gadget, and readers using Firefox should check out our own Better GCal extension.