I'd like to develop a simulation graphical program that can run pretty much anywhere. First thing that comes to mind because I'm old school is java, but java just doesn't do it for me (sorry java guys, i was one for a long time). I'd like something that can run in a web browser or in an application. Maybe HTML5 would be a good idea, but I may even go 3D with this. I can't say what it's for unfortunately, but picture something cartoonish with too high detail graphics.
Opinions please! :)