Outlook on the Desktop

This is a free software to show your Outlook calendar, notes and tasks on your Windows desktop.

• 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.

Reference: http://www.outlookonthedesktop.com/