Yahoo! Widget – Day Planner-Calendar – is a free, easy, and effective way to stay organized.
This widget adds To-Do lists to your desktop, lets you set reminders and deadlines, and will also sync with your Google Calendar, enabling you to add tasks and events to your gCal.
In order to use it, you first need to install Yahoo! Widgets (Win/Mac)…then, head over here and ‘Get It!’.