Geometry

Mirror

Video

The Mirror is shown in the first part of the Video

While the video already gives you a good intro in how to use them, here's a few extra features that got added after creating the video:

Mirror Middle now has the checkbox Matrix on Base that mirrors the vertices local to the vertex matrices. This gives better results when mirroring poses where the basemesh is unsymmetrical.

On MirrorMiddle additionally to Closest Vertex you now also have Closest Point, which is useful when the topology of your mesh is unsymmetrical

Create Symmetry Mesh

Video

Creating symmetry mesh is explained here

Match Vertex Positions

Very simple but extremely seful tool to just match some vertices to another mesh.

Video

See it in action here

Warp Poses

This is for when we have a model change and you have some sculpted poses.

If you are using Shape Editor or Pose Editor, the warping is tied into there. But if you have meshes outside of those tools, you can use this tool to warp them.

Video

See how it works in this video (Model Change).
For the options, the video recommends matrix, but lately is has shown that most of the time Wrap Deformer is the best option, even if topology is the same.
The first part of this video is outdated!. We now use the Pose Editor instead of those python functions.

Warp Secondary Poses

This is for warping poses to secondary meshes

If you are using Shape Editor or Pose Editor, the warping is tied into there. But if you have meshes outside of those tools, you can use this tool to warp them.

Video

See how it works in this video.
The first part of this video is outdated!. We now use the Pose Editor instead of those python functions.

Head Reset

This is usually for modelers, it's to reorder the vertices so all the head ones start from 0. This has the advantage that facial blendShapes can be sculpted on a smaller mesh that doesn't include the body.

Select the head faces, and click Head Reset selected Faces. This will create 2 new meshes:
One with suffix _HEAD1, and one with suffix _NEWTOPOLOGY. It does NOT change the original mesh! So you'll have to delete the original mesh and replace it with the _NEWTOPOLOGY one. The _HEAD one is the one that you can use for creating blendShapes.

Smooth Vertices

This relaxes the vertices. It's similar to the smooth sculpting tool, but works just on vertex (soft) selection. It's very useful for when sculpting Correctives and you want to relax some faces that are collapsed from a pose.

Curve

Here you can slide or move perpendicular some vertices along a curve. It can be useful for sculpting some expressions on a very curved mouth

Warp XForms

This warps xforms between 2 meshes. You have an option to do blueprint ctrls for the Blueprint Rig. So you can use that tool if the proportions changed but topology is the same, or if you are setting up a new character that has same topology but different proportions.

Video

There's a short video on LinkedIn that demonstrates it:
LinkedIn Post on warpXForms