I used this website for a simulation course a couple of years ago and wondered what happened to it. Seems like the author cannot run the site any more due to health issues (eyes). He decided to release the source code on github. See these two links for a little bit of info:

https://groups.google.com/forum/#!topic/zunzun_dot_com/X1rH2...

http://www.zunzunhelp.com/

There should be a lot of interesting stuff for anyone interested in statistics and Python (and node). The site was incredibly useful, among other things it allowed you to upload a csv data file and calculated the distribution that best fit the dataset.

The author even provided a tutorial for setting up your own site with Flask, maybe someone here wants to give it a shot: https://groups.google.com/forum/#!topic/zunzun_dot_com/nFMH_...

Thanks James for the great site when it was up and running and thanks for releasing the code :)

That's truly tragic. It's wonderful that he released his code into the public, but terribly sad circumstances. Thanks for letting us know the story behind this.