Here you can download the current version:
qmatrix-2.2.1.tgz
(106kB, MD5=1b6f7d969ac814b839147f916716c5b2)
This archive contains a Mathematica package to make it easy to perform
typical computations in quantum information theory.
The package is written for Mathematica 3.0 or higher.
The package contains pure ASCII files and should thus be portable to any system running Mathematica.
You can also look at the unpacked contents of the package.
Besides the package main file, qmatrix.m, the archive contains a few more files, including
The source of the tutorial is evaluated (that's why it is so much longer than the (unevaluated) .nb version) and can give you an idea of what you can do with these packages.
There is also an archive of older and deprecated versions.