"...a collection of information and resources for teachers of quantum physics. The resources in this collection are supplements to standard quantum textbooks and include student activities, background information, and applications."
Hyperphysics (electricity and magnetism, light and vision, mechanics, quantum physics, etc.)
"The Centre for Quantum Computation part of the Universities of Oxford and Cambridge, conducts theoretical and experimental research into all aspects of quantum information processing, and into the implications of the quantum theory of computation for physics itself."
Additional material for the paper Wigner quasi-probability distributions for the infinite square: Energy eigenstates and time-dependent wave packets (published in Am. J. Phys. 72, 1183 (2004)