Programs from the Notes
Complete runnable versions of nearly 800 programs in the Wolfram Language from the notes in the NKS book
Basic NKS Images
The most-requested cellular automaton images from the book
Color NKS Images
Color versions of a selection of images from the book

If you do not yet have Mathematica, download the Wolfram CDF Player to run programs in the Wolfram Language for free.

The NKS book is full of unique experiments and unique diagrammatic graphics. For these and more experiments in the Wolfram Language that you can run on your own computer using Mathematica or the free Wolfram CDF Player, check out NKS-themed Demonstrations on the Wolfram Demonstrations Project.