Multi Limbed Model Animator
The MLMAnimator is a modding resource that allows easy dynamic animations for the player model, as well as supporting massive individual changes to player models and sizes without breaking said animations.
On its own this mod will do little other than add slightly different (worse) animations for vanilla actions and enable viewing your own body in first person (able to be disabled via config)
Note that this is an extremely early beta release, and as such is probably full of bugs. You have been warned.