Rhinoceros 

Free form surface modeler that employs the NURBS mathematical system to create models of unlimited complexity. It's useful in architecture, product design, industrial design, vehicle design, and more.

Developing own designs and communicating them to others, essentially requires the use of some efficient designing tools and the Rhinoceros provides just the needed tools to model and document personal designs ready for rendering animation, analysis, engineering, drafting, and manufacturing or construction purposes.

The program also supports polygon meshes and point clouds, as well as comes with extreme precision enabling user to design, analyze, prototype, document, engineer, and manufacture anything of any size, and comes with complete 2-D drafting, annotation, and illustrations.

Rhinoceros caters to the needs of both large models and large teams, and offers great compatibility as it allows the user to exchange files with other design, CAM, drafting, analysis, engineering, animation, rendering, and illustration software. The user can create, edit, document, animate, analyze, render, and translate NURBS curves, surfaces and solids regardless of complexity, degree, and size, and also facilitates uninhibited free-form 3D modeling.

It also supports wide variety of 3-D digitizing arms, 3-D scanners, and 3-D printers, and is highly customizable. Its easy-to-use tools help the user to get the job done without any hindrances, and without the need of spending lot of time too.

File formats supported: DWG/DXF(AutoCAD 200x, 14, 13, and 12 ), SAT (ACIS), DGN, FBX, X_T (Parasolid), 3DS, LWO, STL, SLC, OBJ, AI, RIB, POV, UDO, VRML, BMP, TGA, CSV (export properties and hydrostatics), uncompressed TIFF, STEP, VDA, GHS, GTS, KML, PLY, SketchUP, SolidWorks.