MDL Information Systems GmbH - http://www.beilstein.com/ Official homepage of the database provider. Contains client software, manuals and links relevant to the CrossFire database.
ChemKey Search - http://euch6f.chem.emory.edu/ Organic synthetic method database with thousands of references. Free demo and ordering information available.
Organic Compounds Database - http://www.colby.edu/chemistry/cmp/cmp.html Search the database by melting point, boiling point, index of refraction, molecular weight, formula, UV absorption wavelengths, mass spectral peaks, and/or chemical types.
Physiochemical Properties of Popular Liquids - http://www.trimen.pl/witek/ciecze/liquids.html Physical properties of over seventy popular solvents and liquids. Sort in ascending or descending order of the desired criteria.