irrlicht is described as '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' and is a game development tool in the development category. There are more than 10 alternatives to irrlicht for a variety of platforms, including Windows, Linux, Mac, Web-based and Android apps. The best irrlicht alternative is Torque 3D, which is both free and Open Source. Other great apps like irrlicht are OGRE, HARFANG 3D, Pygame and JMonkeyEngine.
Modern engine, pbr, screen space GI and refelections, VR, Go support, that makes a viable alternative to Irrlicht.