NMR Spectroscopy by W. Reusch at Michigan State University. An excellent NMR tutorial for organic chemistry undergraduate student.
NMR Animations: about halfway down the Molecular Expressions (Electricity and Magnetism) page are several animations, including the Magnetic field lines, the AB Spectrum, the ABX spectrum, Dipolar powder patterns, Spin populations, Lorentzian lineshapes, Quadrupolar powder pattern, and Structure detrmination using NMR.
The Basics of NMR by J. Hornak. An excellent tutorial.
Also: see listings on this site.