Netgen Mesh Generator is an automatic 3D tetrahedral mesh generator. The application is designed to accept input from constructive solid geometry (CSG) or boundary representation (BRep) from STL file format. Create and design 3D meshes with this tool.
This program will generate triangular or quadrilateral meshes in 2D, and tetrahedral meshes in 3D. The input for 2D is described by spline curves, and the input for 3D problems can be defined by Constructive Solid Geometry (CSG), the standard STL file format, or via Boundary Representations (BRep/IGES/STEP) when compiled with OpenCascade support. NETGEN also provides modules for automated mesh optimization and hierarchical mesh refinement. Curved elements or arbitrary order are supported.

The license of this software is Free, you can free download and free use this 3d graphic software.