KAlarm is a personal alarm message, command and email scheduler application by KDE

Features:

• Display alarms using your own text message, the text generated by a command, or a text or image file.
• Audible alarm using a sound file
• Recurring alarm on an hours/minutes, daily, weekly, monthly or annual basis, or set it to trigger every time you log in.
• Display alarms color and font customization
• Support for multiple alarm calendars, which for example enables you to share alarms between a laptop and desktop computer.