This phonebook application allows you to call and send messages to your favorite contacts without spending too much time searching through your entire contact list.
You do not even need to mark your favorite contacts, this application monitors outgoing and incoming calls and sorts out a list of contacts in depend on how frequent you contact somebody.
So that most contacted people are on top of the list and you save your time searching necessary person in the list.
Put a shortcut for this app onto desktop and launch it everytime you are going to call somebody.
Note that the list is empty when you launch the app for the first time, that is because there are no yet any incoming/outgoing calls logged out. Once you make a call or somebody calls you a statistic data is recorded and this list is improved.