OGRE!

Torque 3D is a easy-to-use game creation platform. Architected from the ground up for maximum flexibility and performance across a wide range of hardware and built upon the Frontline award-winning Torque Game Engine Advanced, Torque 3D comes equipped with a full suite of tools and APIs to get your game to the finish line, no matter what your goals. Add publishing paths to PC, Mac, Xbox 360, Wii, iPhone, and the web, and you have the power to distribute games almost everywhere they are played.

JMonkeyEngine3 it’s a free, open source game engine, made especially for Java game developers who want to create 3D games using modern technology. The software is programmed entirely in Java, intended for wide accessibility and quick deployment.

Awakening is a powerful professional real-time 3D solution. With it, you can easily create eye-catching interactive 3D presentations, brief films, games...

The Irrlicht Engine is an open source high performance realtime 3D engine written in C++. It is completely cross-platform, using D3D, OpenGL and its own software renderers, and has all of the state-of-the-art features which can be found in commercial 3d engines. We've got a huge active community, and there are lots of projects in development that use the engine. You can find enhancements for Irrlicht all over the web, like alternative terrain renderers, portal renderers, exporters, world layers, tutorials, editors, language bindings for java, perl, ruby, basic, python, lua, and so on. And best of all: It's completely free. »

The Grit Game Engine is an MIT-Licensed Open Source Game Engine that is highly scriptable via Lua. It supports huge open world maps and dynamically streams assets from disk. The Grit Game Engine is a community project to build a free game engine (and toolchain) for implementing open world 3D games, such as the those in the GTA series, Saints Row, Crysis, Fallout 3, Just Cause 2, Mafia 2, Burnout, etc. Anyone can use the engine as a foundation for their game, and anyone can read / modify / integrate the source code. »

DX Studio combines the latest in real time 3D graphics technology from industry and gaming with rapid application development tools in a powerful 3d engine.

ZModeler (or Zanoza Modeler) is a 3D modeling application. It is aimed at modelers who model for computer games such as 18 Wheels of Steel, Grand Theft Auto, Need for Speed, Midtown Madness or similar video games.

Project Anarchy is a complete end to end game engine and state-of-the-art toolset for mobile. Project Anarchy includes an entirely free license to ship your game on iOS, Android and Tizen platforms.

The OpenSceneGraph is an open source high performance 3D graphics toolkit, used by application developers in fields such as visual simulation, games, virtual reality, scientific visualization and modelling. Written entirely in Standard C++ and OpenGL it runs on all Windows platforms, OSX, GNU/Linux, IRIX, Solaris, HP-Ux, AIX and FreeBSD operating systems. The OpenSceneGraph is now well established as the world leading scene graph technology, used widely in the vis-sim, space, scientific, oil-gas, games and virtual reality industries. »

Arianne is a multiplayer online games framework and engine to develop turn based and real time games. It provides a simple way of creating games on a portable and robust server architecture. The server is coded in Java and you may use Python for your game description, provides a MySQL or H2 database backend and uses an TCP transport channel to communicate with hundreds of players.

3DCrafter (formerly 3D Canvas) is a real-time 3D modeling and animation tool that incorporates an intuitive drag-and-drop approach to 3D modeling.

Unigine Engine is a proprietary cross-platform middleware, developed by Unigine Corp. It is used as either a game engine or as an engine for VR systems. The middleware is aimed to the wide market, so there are various licenses of Unigine, including special ones for independent developers.

Atavism Online is a full fledged MMORPG Engine for use with Unity.

Mycosm is a platform for creating 3D applications, designed to be used by a broad range of developers for many industries. For example, games, engineering simulation, education, visualization, decision support etc. Mycosm consists of a studio tool and freely distributable player.

Simurban® is a 3D simulation software suite that allows users to create, view and interact with accurate and photorealistic models of any built environment. Ideal for development assessment, strategic planning and design.