Desktop iCalendar is a customizable calendar program that gets calendar, events, to-do list and weather on your desktop. It allows you to sync local calendar file with Google Calendar. So you can edit your Google calendar offline, and share the calendar data on multiple computers. Calendar information can be entered from any computer and the data will become visible at all the computers. In addition, it allows using to-do list with Google calendar too. Desktop iCalendar is easily to customizable. It allows you to edit the font, color and background. You can even set it as a transparent calendar.