Even though I intend to use open source as much as possible, I may make an exception in the case of Moho 13.
Moho now has bitmap brushes for proper frame by frame animation.
Moho is great and I used it in the past with the vector tools, however I wanted to get away from just animating with puppet rigs, and it looks like this release will give us more choices for animation types.
In this video McCoy Buck downloads the trial and starts putting it through it's paces.
Also some examples of the different brush types from Charles Kenway.