You don't need an app, you can already create a shortcut to a Person with a default value of "call".

Long Press>Shortcut>Person and that is it.

 

You can also use the people widget and select view contact for default which will allow you to call or text... anyway, just another option. you could make a folder too and place short cuts for the same, keeping your most often called people at quick reach.

Regards

 

This is the method I use, and it works great. I have 1 folder for quick calls and 1 for quick texts on my home view. Most frequently contacted people just 2 clicks away.

 

how about this widget?
http://androidforums.com/application-announcements/242427-contactz-lite-widget.html

you can try it if you like.