Blender 3D

Open source, cross platform suite of 3D tools.

Blender 3D Tutorials

Cipher

3D game engine

Construct2

Make games.

Gameroom

Windows desktop gaming platform from Facebook.

GameSalad

Create games without code. Free and paid versions.

Genesis3D

Open source real-time 3D rendering engine

HTML5 based game engines and frameworks

IRR LICHT

Open source cross platform 3D engine

libGDX

Java game development framework.

Lumberyard

Game engine from Amazon.

OGRE

Open source 3D graphics engine

Panda3D

C++ game engine made and used by Disney. It's owned by Carnegie Mellon University.

Phaser

HTML5 game framework

Sculptris

Free modeling software that mimics sculpting a piece of clay.

Shiva3D

3D game engine with graphical editor to create applications and games for Windows, MacOS, Linux, iPhone, iPad, Android, Blackberry, QNX, WebOS, Marmalade and Wii

SI02

OpenGLES based cross-platform 2D and 3D game engine for iOS, Android, MacOS and Windows

Turbulenz

Create, test, and monetize your game.

Unity3D

Tool for video game development. Free and paid versions.

Unreal

Game engine. Free and paid versions.

XNA Game Studio

reate video games for Windows-based PCs, Xbox 360 consoles (with an active premium XNA Creators Club subscription), and Zune digital media players using C#.

YoYo Games

Home of GameMaker: Studio, for cross-platform game development.