Maya Copy/Mirror SDKs
UI for copying and mirroring driven keys in maya.
Mirror mode copies keys from driven objects to matching objects with mirrored prefixes e.g.("L_" -> "R_") and connects them to mirrored driver controllers.
Copy mode duplicates the keys on the objects selected, but copies them to a different controller, allowing you to have multiple controllers drive similar keys. This is useful for "splitting" driven keys into separate controls, for example in a hand rig, you may want a hand controller that drives all of the fingers simultaneously. This script will let you copy part of this keypose onto individual finger controllers so you only need to pose them once.
Place in your documents/Maya/scripts folder, then add the following (python) code to a new maya shelf button:
import copy_sdk
copy_sdk.open_ui()
A Python script for Maya that allows you to copy driven keys easily.