Hi guys!
My favorite is the Quest3D v4. I use this in my work mainly for my demo and actual output or either realty, games, movies, and other interactive presentations. I definitely would recommend this to everyone.
Quest3D Allows us to publish our work either the web or just a simple executables.
Try it out:
Welcome! - Quest3D - This is the main website
Quest3D Demos - Quest3D - some demo sites