Saigumi, Jrnovoa, Joi, and Gorgon Zola now posted 5 example applications using the Irrlicht Engine with source code included into the offtopic forum. Gorgon Zola for example posted a very impressive quad tree terrain scene node, with LOD rendering. I made screenshots of 4 examples, you can take a look at them on the left or in the screenshot area.
I also added one of the shots representatively of the others as shot of the week