MeshWorks for Rhino 

MeshWorks for Rhino is a plug-in for Rhino. It adds a variety of mesh manipulation commands to Rhino.
mesh works meshes manipulation plug-in add-in rhino utility utilities rapid prototyping polygon mesh hollow

MeshWorks 

MeshWorks is an advanced mesh editing software built using the powerful MeshLib mesh library.
mesh mesh software edit mesh software manipulation utility utilities polygon mesh triangle face vertex edge point cloud