3D/2D bin packing. Given multiple bins and items to be packed into the bins, the algorithm attempts to find a good solutions of how to pack. I got so many requests for this that I made it into a real life project. Check out the site. It has comprehensive documentation on how to call the API with all the popular languages (Java, php, C#, ruby, python). I hope it works for you! If not just email me or make some posts here. I'll try to setup some ticket system soon to take requests.
