I recently stumbled over ShiVa, a 3d game engine. In fact, I am so impressed, that I’ll also include it in the rapid prototyping tool part of my thesis, although I actually have finished that chapter. For only around 200€, you get the full package: webplayer publishing, mobile devices (iphone and Android) and of course cross-platform PCs (Win,Linux,OSX).
I’ve ported a small 2D game we did for Android in about three days. Since I also had to get the hang of ShiVa, I think that is quite a small amount of time. I am going to wrap up the experience I made the next few weeks (hopefully more frequently than the last two months), so stay tuned!