Realsoft 3D 

Feature wise, Realsoft 3D introduces features like SDS modelling, ray tracing, advanced physics simulation, open design. The program is used for example by artists working in the advertising industry, architects, product designers, game industry.
3d realsoft 3d modelling animation rendering photo realistic b-spline subdivision booleans particle collision skeleton kinematics behavioral

MeshWorks for Rhino 

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

Mesh To Solid for Rhino 

Mesh To Solid for Rhino is a plug-in for Rhino 2.0 and 3.0. This plug-in gives Rhino to ability to convert a mesh into a solid.
mesh to solid for rhino mesh solid mesh to solid convert converter polygon mesh plug-in add-in rhino translator utility polysurface surface