Desktop Calendar
Desktop Calendar is a free desktop enhancement program which can add a calendar and to-do-list to your computer's desktop. Everyday when you powered on your computer, you will see a calendar on your desktop with your full control. You may change the desktop's color, calendar's color, calendar's... This freeware features active calendar,intuitive to-do-list and customizable background and text colors. ... And you may schedule your to-do-list.
http://www.bestshareware.net/tools/dcsetup.exe - 286Kb - Download - Screenshot

Desktop Calendar Reminder
Desktop Calendar Reminder is simple, compact and easy to use desktop calendar. It has digital clock, calendar and note's area for every day. There are options for changing calendar colors, fonts, style, and more. It is the best desktop calendar, download now!
http://www.softjournal.com/desktop_calendar_reminder/download.php - 298Kb - Download - Screenshot

WinDates
Discover the world of Internet calendar sharing with this date organizer and reminder that features the ability to subscribe to and publish calendars in the standard iCalendar format. Calendars such as holidays, sports, entertainment, and many more are available and may be viewed along with your... WinDates is a full-featured desktop calendar providing month, week and day views, event list, alarms, age calculation, task tray calendar, network support, printing and many customization options. ... Create and publish your own calendar of events to share with your family, friends and colleagues.
http://www.rockinsoftware.com/wdates.exe - 1Mb - Download - Screenshot

Desktop Calendar Maker
Now you can quickly create monthly calendars with ease. Select your own graphics or use the beautiful photos included. You can even make the calendar your desktop wallpaper.
http://www.yournameherenow.com/YNHN1.zip - 2Mb - Download - Screenshot

Calendar 2000
Calendar 2000 is a small utility that will display a monthly calendar on the Windows desktop. The calendar is similar to the one found in most checkbooks. You can also define your own holidays and important dates, but Calendar 2000 is not a full-blown time scheduler. ... Calendar 2000 is a very small program and can easily be configured to be run directly from the Taskbar icon tray. ... Instead use Calendar 2000 to quickly check the date or calculate the day on which a certain date occurs. ... Monthly calendars from January 1583 to December 3000 can be displayed and printed.
http://www.gregorybraun.com/CALENDAR.ZIP - 252Kb - Download - Screenshot

XDeskCal
XDeskCal is a pretty,fully customizable calendar and PIM features Todo-list,Appointments,Alarms,Holidays and displays its data on your desktop. It is a very lightweight application that doesn't use much system resources or take much space on your desktop. ... You give each its own color and icon, and your color choices are unlimited,and XDeskCal provides many icons picture for your calendar, select any to mark the special calendar and items as you like.. ... Bringing great convenience to your work and life, XDeskCal is indeed an indispensable assistant to you,redefined the desktop...
http://www.qwerks.com/download/8222/XDeskCal_setup.exe - 3Kb - Download - Screenshot

Web Calendar Pad
The Web Calendar Pad is a program that you can use to make HTML photo calendars that visitors can view,print and subscribe to with RSS. Use to create illustrated monthly calendars, that can look either like wall or dekstop calendars and be published automatically to your website, a file, saved... No need to battle html code ever again, you can choose the look of your calendar from a large list of defined styles and templates, or easily create your own custom look that can include photos, backgrounds, and fonts.
http://www.calendarpad.com/download/calendarpad.exe - 9Mb - Download - Screenshot

Desktop Lunar Calendar
Desktop Lunar Calendar is simple, fun and easy to use calendar. It is accurate anywhere in the world. It has two parts: image of the current moon's phase and compact, harmonic moon calendar. The 4 main quarter phases - Full, New, First Quarter, and Last Quarter - are marked on the calendar. ... You can change color of the calendar, size of the moon's image, time's format and more, download now!
http://www.moonphasesoftware.com/moon_calendar/download.php - 481Kb - Download - Screenshot

Softmos Calendar
Softmos Calendar is a simple program, which helps you to design personalized calendar for your everyday use. A wide range of options is available to customize the calendar appearance. You can create calendar for a single month or for whole year, specify fonts and colors, insert any picture or... Having made a calendar, you can print it or place on your computer desktop as wallpaper.
http://www.softmos.com/Download/SoftmosCalendarSetup.exe - 320Kb - Download - Screenshot

Chameleon Calendar
Chameleon Calendar creates an active calendar on your desktop wallpaper. Set up pleasant working atmosphere by adding a full-functional PIM on your desktop. Chameleon Calendar works with any background style, always providing the best result possible, using its unique Chameleon Skin feature.
http://www.softshape.com/download/chamcalendar.zip - 3Mb - Download - Screenshot