WinCalendar a Windows pop-up desktop calendar with holidays & support for daily notes / appointments. WinCalendar features when running stand alone in Windows:

• Loads easily by hotkey or from the system tray (optional).
• Customizable size & features.
• Advanced scrolling design for optimal calendar viewing.
• You can use your mouse’s scroll wheel for quick date navigation.
• The selected date is put into the clipboard in a format you specify.
• Supports stored daily appointments, birthdays or user holidays.
• inWordWinCalendar also integrates within Word & Excel as a date picker.
• WinCalendar also generates printable Calendars in Word & Excel.
• Free samples of Word and Excel calendar
• Stored appointments appear on generated calendars.
• One-key shortcuts for ease of use (press ‘T’ to go to Today).

Free for Windows: 98, 2000, 2003, ME, NT, XP, Vista. The free version does contain feature limitations with regard to: holidays, calendar size, calendar format & allowed calendar entries.