NIST Mass Spectral Database, EPA, NIAH, NIST08, Chemical Structure Search, Mass Spectra Library

NIST/EPA/NIH Mass Spectral Database (NIST11) and Search Program - A mass spectral database of the NIST/EPA/NIH Mass Spectral data that contains electron ionization (EI) spectra used to expedite the identification and analysis of unknown compounds.
NIST Enterprise - Client/Server version allows for multiple simultaneous users and increased flexibility
NIST RI Index for GC - A library and search program for GC Method Development that is an essential tool for anyone performing gas chromatography.
NIST MS/MS Database and Search Program- A library of MS/MS Spectra