Free Open Source Alarm Clock Program

( For Windows developers only, if you are a general user, please check out Free Alarm Clock. ) CAlarmClock is a free open source alarm clock application developed by DaveeCom, you can develop your own alarm clock software based on it easily.

Free Open Source Alarm Clock Program

CAlarmClock measures time with the timeSetEvent API function, which means that it has a resolution of 1 millisecond.


  • Built-in calendar selector.
  • Alarm only once.
  • Repeat alarm every DD:HH:MM:SS:MS( days, hours, minutes, seconds, milliseconds ).
  • Repeat alarm on a specific day of every month.
  • Repeat alarm on specified days( Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday ) of every week.
  • 3 different repeat end conditions: Repeat forever, repeat a certain number of times, repeat until the assigned date.

CAlarmClock is a 275KB download available from Grab a free account from here. )

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