Flip Countdown
This module has various options:
You can define the layout of the counter ( DailyCounter , HourlyCounter , MinuteCounter, TwentyFourHourClock , TwelveHourClock , Counter )
You show/hide seconds in Daylycounter layout.
The Calendar field alows you to set a date in the future with a hour and minute precision for the countdown to process.
You can add some text before and after the counter and set the text to be displayed when the countdown is completed.
You can enable/disable jQuery in case it is needed/not needed
The module styling is editable via CSS.