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“The Irrlicht Engine is an open source high performance realtime 3D engine written and usable in C++ and also available for .NET languages. It is completely cross-platform, using D3D, OpenGL and its own software renderer, 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… You can find enhancements for Irrlicht all over the web... And best of all: It's completely free.”

How to obtain: Download, Free