bh_aimTools is a new animation tool I've created for Maya, inspired by the workflow demos of Richard Lico. It streamlines the process of using aim targets to control rotation animation and applying the animation back to the controls. This gives powerful and intuitive ways to visualize and interact with rotation-based animation in 3D space.
Please see the following video for a quick overview of how the tool works :
This video shows another potential application - using existing animation to very quickly create secondary animation :