ChemToolBox, the swiss army knife of the lab worker, is a freeware which contains numerous scientific data very useful in a laboratory. Thanks to its own database, ChemToolBox will easily substitute to the time-consuming use of scientific books (such as Handbooks) or online databases. ChemToolBox is a freeware desitinated to a broad audience (any level students, Ph.D. or even senior scientists) and will be a precious help in various fields such as organic chemistry (properties of solvents, miscibility and polarity, cooling mixtures), solution chemistry (acid/base and RedOx couples, colored indicators, complexes, salts, fluorochroms), spectroscopy (IR, 1H and 13C NMR data), biochemistry (amino acids, nitrogen bases, carbohydrates, fatty acids, SDS-PAGE), etc. ChemToolBox also has a full periodic table of elements (with the picture of all elements), a units conversion and calculations module, as well as numerous scientific constants with SI units and derivatives. All these data can be exported in HTML.