Autodesk Meshmixer

Blend existing meshes to create new 3D models within minutes

Screenshots

Hunter's comment

Sometimes when you make a model in a software it doesn't give you your desired details. Worry not, Meshmixer is an Autodesk tool to give you a neat and clean finishing. It will look cool too after you 3D print the mesh-mixed design.

Do you need to clean up a 3D scan, do some 3D printing, or design an object that fits something else? Meshmixer can help. Think of it as a sort of "Swiss Army Knife" for 3D meshes.
Source

Click here to download the software