Searching for scientific visualization/modelling tools for use on a website

I am a physics student, and I have old code laying around from some projects I have done. I would love to create a website where I can talk about the project, demo the code being used and explain my findings, but I have no experience with web applications/development. I would love any suggestions on: Tools/tutorials/the right direction<p>The code I used is mostly MATLAB and FORTRAN, but I am pretty sure I can port the MATLAB code over to octave.<p>Wouldn't it be nice if science (physics) people did this? If every theoretical paper you read had a linked online document that demoed the code, allowed you to play around with the parameters and see the results?<p>Yes, the answer is yes.