Blender Meshwalker

Transfers the world position of vertices from a target mesh onto a source mesh, even when the two have different vertex counts. Works in object space or world space.

Useful wherever two meshes need to agree on a surface: aligning parts of character meshes, matching deformations between versions of an asset, or synchronising mesh segments that were edited separately.

There's a demo video on YouTube.

Inspired by Olygraph's Geometry PickWalker for Maya.