Feature request: Smooth Directional Brush, Shrinkwrap Brush, Clone Brush

These features are what I'm missing in Blender comparing to ZBrush.

The Smooth Directional is awesome tool, you can smooth the bumps along the folds, creases and ridges, not affecting their shape. A general-purpose Smooth brush that we have now just smooths everything in all directions.

The Shrinkwrap Brush (Project Brush in ZBrush) is a brush that projects geometry of other mesh(es) to the active mesh under the brush. It basically has to make a vertex group under the brush and apply Shrinkwrap modifier to the vertex group, but it has to do it in real time for fine adjustments. It is super helpful for retopology, for example.

Clone Brush (forgot it's name in ZBrush) is working very similar to the Clone Stamp Brush in Photoshop - you click on the area on the surface of your model, it copies the surface area, which you can then clone on other parts of your mesh or maybe on other meshes. As I understand it, it creates temporary VDB brush that clears after you copied another area or exited the app. I'm not sure if the brush from ZBrush could continuously clone the surface like the PS Clone Stamp can do, I'm fine with at least cloning what is under the brush width.

The first two of these brushes are already in the inactive sculpt dev branch of Blender, and they are there for quite some time.

Alternatively, if any skilled programmers read this, I would gladly pay for an addon that will bring this functionality to Blender, it would be cheaper than buying ZBrush only because of couple of brushes.