[Osiris]

The Outlook Calendar does have a serious disadvantage if you compare it to a normal paper calendar though because it is not visible all the time. A paper calendar is always visible and Outlook does not offer this functionality unless you use Michael Scrivo’s Outlook Desktop application.
The requirements for this application are Windows 2000 or higher, Microsoft Outlook or higher and the Microsoft .Net Framework 2.0. If your system meets the requirements you can display a daily or monthly view of your calendar on your desktop. You can set the transparency level as well. The calendar is basically a second wallpaper on your system.

Features as mentioned on the developers website:
* Places fully functional Microsoft Outlook Calendar on your Desktop.
* The Outlook Calendar is pinned to your desktop so that no windows can get stuck behind it.
* The Calendar’s position, size and opacity are all adjustable via a very intuitive GUI.
* A tray Icon (complete with the day of the month) is provided to to configure the app and perform other actions.
* Multiple-Monitor Support.
* Ability to switch between calendar, inbox, contacts, tasks and notes views.
Outlook Desktop seems to be a pretty good solution for everyone who is using the Outlook Calendar regularly.