FormulaWeight2010 1.1.1 that could have been downloaded from our website for free. The program lies within Office Tools, more precisely Calculators. This free tool was originally designed by Harukazu YOSHINO. The following version: 1.1 was the most frequently downloaded one by the program users. The common filenames for the program's installer are fw.exe or _13F06D08987C93A502B40A.exe etc.
From the developer:
FormulaWeight is a free scientific software to calculate formula/molecular weights of chemical substances. The newest atomic weights from IUPAC are used in this software. Perhaps no further information is needed if you know something about chemistry. The following is an example of calculating the molecular weight of ethanol that is the second most important liquid material, at least to me, on the earth
You may want to check out more software, such as Free QuData Calculator, AcadCalc or iUnit, which might be similar to FormulaWeight2010.