EveryKey

Character animation at its core is an art form, and there should be as few barriers between the artist and their canvas as possible.

This addon simplifies three crucial processes of 3D character animation and makes them almost instant, saving you precious time and streamlining your workflow.
These features have been condensed to a simple button press:

Add keys to all bones
Add keys to selected bones
Reset rig to rest pose

This addon works via hotkeys available to you within the 3D viewport. 
While in pose mode you will be able to press Y, Ctrl-Y and Ctrl-Shift-Y to: add a key to all bones, add a key to all selected bones and reset rig to rest pose respectively.
While in pose mode, a small EveryKey button will appear on the left of the viewport.
This button contains a drop down displaying all of the hotkeys should you ever need to be reminded, and a support button that allows you to see my other work, should you be so inclined.