Please go to https://github.com/rcalinjageman/esci-web for live version (fork) as this is no longer updated.
You can see which version by hovering on the logo.
This is a JavaScript implementation of the esci software (Exploratory Software for Confidence Intervals) that accompanies:
by Geoff Cumming and Robert Calin-Jageman
It uses D3 for some aspects, jQuery, jStat and tippedjs (for tooltips) and at times just plain old JavaScript which reaches the parts other libraries cannot ;)