People ask from time to time whether we provide a numeric keypad. The answer is no, but one can create a virtual numpad very easily in Agent, the configurator application of the UHK.
See the following screenshot. The numpad is mapped to the Fn layer, and its keys are laid out in a familiar fashion.
The big advantage of a virtual numpad is that one doesn't have to reach out all the way to the other side of the keyboard. This results in increased productivity, and the mouse is much closer, too. That is, if you even use a mouse after mastering the UHK mouse layer.