Rhinoceros^® is a free form 3D modeling software for industrial design and creative works and is developed by Robert McNeel & Associates.

Built on the principles of NURBS geometry, Rhinoceros can define and create curves, surfaces and solids with unparalleled accuracy and flexibility and there is virtually no limit on the complexity or size of the design work that Rhinoceros can handle.  It is one of the most easiest 3D modelling software to learn and use.

How is Rhino different from other modeling and 3D software?
The primary differences between Rhino and other 3-D software products are:

• Unlike most modeling products, Rhinoceros 3D modeller works well as standalone solution and also as a companion to other modeling and graphics products. In order to work with Rhino, other products don’t need to be Rhino plug-ins.
• Rhino supports file formats that cross the 2D and 3D boundaries of CAD, CAM, CAE, multimedia, illustration, and graphics.
• Rhino will model anything accurately. For simple shapes, other products can be more efficient, but with Rhino, you will always be able to finish the model—no matter how complex.
• Rhino is easy to learn.  It is much easier to pick up the basics of 3D design if you use Rhinoceros 3D modelling software as your foundation.
• Rhino is low cost. The cost is a mere fraction of the cost of other software of similar capability.

You should consider Rhinoceros if:

• You’re still working only in 2-D and don’t want to be left behind.
• You need to design—not think about software.
• Your current modeling software is too inaccurate for manufacturing.
• You would like to control your design all the way through production. Start by controlling the model.
• You need access to many different file types to complete your project.
• Your designs are stifled by your software tools.
• You need better free-form modeling tools that work with your other software.
• You don’t like to spend so much money on software, maintenance, and support each time you hire another designer.
• You need 24-hour-a-day, 7-day-a-week online support.
• You need to capture a physical model onto the computer.
• You want direct access to the developers of the software.
• You would like to buy software that has been field tested by more than 100,000 users before it was first released.
• You would like to have a 3D software that has numerous add-on products, including 3rd party solutions, for your special or industry specific requirements.
• You would like to doodle in 3-D anywhere you might be.

Rhinoceros is the official and thus, correct name of this software.  The official short name is Rhino.

It is commonly, though inaccurately, refered to as Rhinoceros 3D, Rhino 3D, Rhino3D or Rhino 3-D.  If you were searching for any of these, you have come to the right place.