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I don't know if this website hasn't been mentioned here previously, I think it hasn't. the nanoHub offers the possibility to upload simulations and other online ressources. these are more thought for the use in nanosciences than in climate modelling, however I think some simulations (like the petrinet simulations) may come close to that use.
I included the URL to the azimuth code page I am not sure though wether this is a good place too put?