Rainlendar is a compact desktop calendar comes with some powerful features. It integrates nicely with your desktop wallpaper and allows interactive access to selected dates, just click on a date to add an appointment or reminder.

It also comes with a ToDo list to do and can optionally be displayed or maintained hidden features. Calendar automatically supports one-time and recurring events and tasks reminder alarm options. It highlights day appointments and you can quickly switch between months via keyboard shortcuts or your mouse wheel.