2D NMR: Introduction to (high resolution) multidimensional solution NMR spectroscopy. Description of line-shapes, product operator formalism, phase-cycling, pulsed field gradients and relaxation. By James Keeler. Also contains the full text of "EMBO Course: Il Ciocco" lecture notes

Acorn NMR: Offers desktop NMR data processing software and operates a high resolution NMR spectroscopy service in Fremont CA. Includes the SAM manual

Basics of NMR: A very well written comprehensive treatment of NMR, includes math and numerous animations. Written by Joseph P. Hornak, Ph.D

NMR Periodic Table: One of the most useful NMR Periodic table on the net. All common nuclei with all useful parameters are listed

The Basics of MRI: Hypertext book by Joseph P. Hornak, Ph.D