Rainlendar is a customizable calendar that displays the current month. It is a very lightweight application that doesn't use much system resources or take much space on your desktop.

Features:

• Small and lightweight
• Different type events can have different appearence
• Supports Windows transparency
• Synchronizes events between several clients
• Localized for multiple languages
• Shows an alarm when an event is due
• Supports iCal files.
• Shows Outlook's appointments
• Includes a todo-list
• Works also as Litestep plugin
• Displays the current date in tray icon
• Can stick to the desktop (i.e. doesn't hide with Show Desktop)
• Hotkeys for quick access
• Easy skinning with an UI
• Can be controlled from 3rd party applications with !bangs