QIP.py is a project mainly written in Python, it's free.
A library of useful functions for doing quantum information calculation (built on top of NumPy/SciPy)
This is a simple library for performing quantum information processing (QIP) calculations using NumPy/SciPy.
It is still in its larval state.
qip
defines the functions
qip.pauli:
defines the matrices id, x, y and z as well as the functions
qip.open_systems:
defines the functions
it needs