If you are targeting Win/OSx and Linux you'd better just using Qt4.<br>I can tell you from experience that it is easier than Qt3 at least if you don't have any experience until then.<br>Learning KDE and Qt at the very same time seems tough to me, although plugin structures could be easier to implement with KDElibs.
<br>Sorry, this is not meant to be an anti-KDE-advertisement, but I just want to tell you that you try to do a lot and your project is still a little bit ...what I'd call underspecified :)<br>Do you have examples of simulations you'd like to offer?
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