This document describes tools capable of enabling users of mobile communication devices to create communication groups quickly and easily. With such a communication group a user may call, text, or instant message all persons in the group at once by selecting the communication group rather than each person in the group. In one embodiment, the tools enable a user to build a communication group by dragging and dropping indicators for persons he or she knows from one area of a screen into another area. In another embodiment, the tools automatically collect persons from those that the user knows based on one or more criteria. The user may then easily create a communication group of those collected persons, such as by tapping on an area of a mobile device's display.