Databases

CRC Handbook of Chemistry and Physics
http://www.hbcpnetbase.com/
Data may be accessed after purchasing a personal or institutional subscription.

BioMagResBank
http://www.bmrb.wisc.edu/
A database for NMR spectroscopists working on proteins, peptides, and nucleic acids.

Enhanced NMR Periodic Table
http://www.chem.tamu.edu/services/NMR/periodic/
Useful database of the magnetic properties of nuclei that may be used in NMR spectroscopy.

Spectral Database System for Organic Compounds
http://riodb01.ibase.aist.go.jp/sdbs/cgi-bin/cre_index.cgi?lang=eng
A database system for organic compounds including NMR, FT-IR, Raman, and ESR spectra.

Tutorials

Nuclear Magnetic Resonance Spectroscopy
http://www.shu.ac.uk/schools/sci/chem/tutorials/molspec/nmr1.htm
Theoretical principles of NMR.

Nuclear Magnetic Resonance
http://hyperphysics.phy-astr.gsu.edu/hbase/nuclear/nmr.html
HyperPhysics page on NMR which is quite basic.

Nuclear Overhauser Effect
http://bouman.chem.georgetown.edu/nmr/noe/noe.htm
Nuclear overhauser effect.

Solid State NMR
http://mutuslab.cs.uwindsor.ca/schurko/ssnmr/
A tutorial by Rob Schurko from the University of Windsor.

Software

Online Programs for Spectroscopy
http://www.spec-online.de/
Interactive aids for interpretation of IR and NMR spectra of organic compounds.