Curve Animation Editor for DS4
IMHO, an animation program is not complete without a curve editor. If you are not familiar with this, it is a graph that show the curved motions of a joint. Since I started animating, curve editors have been my main way of editing animation, and the best way to see the oddities in movement to produce the smoothest animations possible. All of my final checks and edits of an animation, especially motion capture is done in curve editors.
I will list a couple of examples below.