Selection Sets

Hi, I was wondering if there was any current python scripts that would enable a simple function to create a dropdown list or panel for selection sets, similar to Max or Maya? The idea being that in ‘Pose’ mode I want to be able to quickly select let’s say all the hand/feet controls (that I would have already pre-determined into a selection set or group) and be able to add keys to that entire set at any given frame. It would really help to speed up animation, but I can’t seem to find any function that allows you to do this easily by default. Thanks!