Unreal Engine

unreal-engine

Unreal Engine is a complete game development framework for PCs, Xbox 360, iOS, and PlayStation 3, providing a vast array of core technologies, content creation tools, and support infrastructure content.

Every aspect of the Unreal Engine game development toolset has been designed with ease of content creation and programming in mind, with the goal of putting as much power as possible in the hands of artists and designers to develop assets in a visual environment with minimal programmer assistance, as well as giving programmers a highly modular, scalable and extensible framework for building, testing, and shipping games in a wide range of genres.

Website & download: http://www.unrealengine.com

Unity

unity3d

Unity is a game development ecosystem: a powerful rendering engine fully integrated with a complete set of intuitive tools and rapid workflows to create interactive 3D content; easy multiplatform publishing; thousands of quality, ready-made assets in the Asset Store and a knowledge-sharing Community.

promo-mecanim promo-quality promo-workflow

Website & download: http://unity3d.com

NaroCAD – Free parametric 3D CAD, CAM software

narocad

NaroCAD is a fully fledged and extensible 3D parametric modeling CAD application. It is based on OpenCascade. A CAD software to help you with your work.  The goal of this project is to develop a fully fledged and extensible 3D CAD software based on the concept of parametric modeling of solids, comparable to well known solutions.  These functionalities are interrelated through Model Associativity and are exposed through a GUI. The general usability specifications like saving, importing are described in General functionality specifications . The software can be extended through Plugins and programming interface.

Download :  http://sourceforge.net/projects/narocad/
Website: http://narocad.com