The SDBS spectra database is recommended. You can look for a molecule using its common name, or its total formula and you can then access 1H and 13C as well as IR and mass spectra... You can look at the Bruker periodic NMR table to know everything concerning the magnetic properties of a nucleus. You can get some of their NMR data as well. Here you will find a useful article about residual solvent in deuterated solvent signals. There, some correlation tables of nuclei we investigate most at the CCRMN. Do not hesitate to let us know if you find others. With special thanks to Keith Enevoldsen for his Periodic Table of the Elements, in Pictures and Words..
