(A rare piece of software not getting older with time; and in general, other Falstad's simulations are great, especially Ripple Tank for optical interference and electric circuits.)
I would love to see such things rewritten to JS. And it does not sounds strange, as there are some applications based on Falstad's code, e.g. http://icircuitapp.com/.
http://www.falstad.com/qm1d/
(A rare piece of software not getting older with time; and in general, other Falstad's simulations are great, especially Ripple Tank for optical interference and electric circuits.)