alarm app with vibration-only mode?

[pandrod]

Couldn't find a way to do this with the default Android Alarm program.
I want my phone to vibrate in my pocket when the time comes without making any actual (speaker) noise.

Is there any app which can do that?

 

[tschepis]

I use alarm clock plus and it has an option for vibrate only.

Tarra

 

[El Presidente]

As does the DoubleTwist alarm clock by the looks of things.