This app is very quick and easy to use. It displays all months of the year on your desktop with some nautical images in the background. You can hide/show the calendar with a button click. You can change the year, look at individual months or weeks, and add events to days.
Unfortunately there doesn't appear to be any integration with iCal or preferences to customize the calendar. Furthermore, this appears to be a 'free sample' advertisement for customized calendar apps from Desktop ADvantage. Clicking on the HOME button brings up the company website, and it doesn't seem possible to change the URL.
To sum it up, the app is free, looks beautiful (if you are into the nautical thing), but can't be customized and has no iCal integration.