Rainlendar is a feature rich calendar application that is easy to use and doesn't take much space on your desktop. The application is platform independent so you can run it on all major operating systems: Windows, Linux and Mac OS X.Downloadhttp://www.rainlendar.net/cms/index.php?option=com_rny_download&Itemid=32
The appearance can be customized with skins and you can even mix different skins together.
It is possible to use Rainlendar with other calendar applications too. Rainlendar uses the standard iCalendar format to store its events and tasks so you can easily transfer them between applications. You can also subscribe to online calendars and task lists including the Google Calendar* and Remember The Milk* and edit your Outlook** appointments directly in Rainlendar.
That's a trial version, if you want the full, I'm sure you'll find it somewhere on the net.
Enjoy this wonderful application :T