The BrewPlanner is an expert system for recipe design and serves as free collection of formulas to aid development of open source projects. The download area contains basic versions of the brewplanner.
Advanced and extended versions of the brewplanner are contributed by my friend Prof. DDr. Andreas Magauer and can be found in the /magauer subdirectory.
If you need to do stoichiometric calculations you may want to try my molcalc.com WebApp.
Please respect the licence conditions! Our standard is GNU GPLv2 or later, read COPYING.TXT.