Essential FTIR can search libraries of spectra available from third-party vendors. All of these vendors offer high-quality collections of Transmission FTIR, ATR, Vapor Phase and Raman spectra at attractive prices.
When ordering STJapan, Aldrich, or NICODOM databases, specify the format to be "Galactic - Grams/32 & SpectralID". Essential FTIR can search any database from any source that is in "Galactic - Grams/32 & SpectralID" format.
Most spectral library formats are proprietary. A library builder program places your spectra into a database with an undocumented format. If the software that built the libraries is no longer available, your data is trapped in the database with no way to view it or extract it. If you no longer have the original spectral datafiles, your data is lost.
This can't happen with Essential FTIR, because user libraries are simply folders containing spectral data files. To maintain the library, you just drop files into the folder.