Rainlendar is a small but extensive calendar that is highly customiseable. The tool displays the current month on your desktop and can be anyplace on the desktop. In addition, the software supports skins.

Features:

* Various display options for different dates
* Supports window transparency
* Sync with many clients
* Localisations for many languages
* Alarm function for dates
* Syncronises appointments and tasks with Outlook
* ToDo list
* Works also as LiteStep plugin
* Displays the current date in the tray icon
* Can be anchored to the desktop (will not disappear when clicking on “Show Desktop”)
* Personally customised hotkeys for quick access
* Simple adjustment of the surface by numerous skins

Conclusion

Great calendar tool that is also portable and therefore can be launched from a USB stick. Rainlendar uses few system resources and is highly recommended. Rainlendar Pro ($9.95) adds support for Outlook, Google Calendar and iCal.