Computer-aided design (CAD), also known as computer-aided design and drafting (CADD), is the use of computer technology for the process of design and design-documentation. Computer Aided Drafting describes the process of drafting with a computer. wikipedia.org

Rhinoceros (Rhino) is a stand-alone, commercial NURBS-based 3-D modeling tool, developed by Robert McNeel & Associates. wikipedia.org

Gemvision Matrix is a 3D jewelry design CAD/CAM software. It allows users design virtual 3D jewelry on-screen while generating a detailed color preview image that can be printed or emailed. Matrix then outputs all file types compatible with any CAM (Computer Aided Manufacturing) devices.

ZBrush is a digital sculpting tool that combines 3D/2.5D modeling, texturing and painting. It uses a proprietary "pixol" technology (see below) which stores lighting, color, material, and depth information for all objects on the screen. wikipedia.org