- Reagent Calculator - http://members.empowering.com/gwfran/rgntcalc/
- Windows software for the calculation of molecular weight, molecular formulas, mass percentages, mass spectroscopy fragments and adducts, and elemental analysis component; also includes a reagent library.
- Elem - http://zarbi.chem.yale.edu/~ivan/elem/
- Free program for the interpretation of elemental analysis results. For Windows and Unix; source code available.
- JFormula - http://www.jformula.com/bomhome.html
- Information System intended to support multi-stepped technological processes that can be defined on a table of mixes and ingredients and do not involve chemical reactions. The system includes an algorithm to calculate material requirements.
- Physicochemical Calculators - http://www.trimen.pl/witek/calculators/calculators.html
- Simple online and offline calculators for boiling point at reduced pressure, unit conversion, and molecular mass.
- Isotope Pattern Calculator v2.0 - http://www.geocities.com/junhuayan/pattern.htm
- A JavaScript shareware program that calculates isotopic ratio patterns for molecular fragments.
- MS Tools - http://www.sisweb.com/mstools.htm
- Online exact mass calculator, mass spectrum generator, and isotope distribution calculator.
- Norgwyn Montgomery Software - http://www.norgwyn.com
- NGMSI sells software for 3-D molecular modeling, chemical database creation and manipulation, 2-D publication quality drawing, calculation of over 100 physical properties from structure, automatic chemical internet database generation, and QSAR and QSPR analysis as well as chemical databases.
- Visual MINTEQ - http://www.lwr.kth.se/english/oursoftware/vminteq/index.htm
- A free equilibrium speciation model, which calculates chemical equilibria in aqueous systems at low ionic strength.
- Chemical Calculator - http://www.chemicalcalculator.com/
- Chemistry shareware for Windows which calculates the amount of reagent to use when mixing, diluting, and dispensing solutions.
- ChemBuddy - http://www.chembuddy.com/
- Calculators for pH, solution preparation and concentration conversion, acid-base equilibrium, buffer, hydrolysis, and dilution calculations.
- Laborant Chemstation - http://www.lcs-chemie.de/english.htm
- English version of German freeware data analysis program, for various calculations including stoichiometry, pH, thermochemistry, and kinetics.
- Chemistry Functions - http://www.umass.edu/ednet/chemistry.html
- Molar conversions and an interactive periodic table directly on the webpage. Requires JavaScript.
- Chemical Calculator - http://freenet-homepage.de/buick/
- Free Windows program for calculateing conversion factors between compounds, concentration, and amount of substance in solution.
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