Visual MINTEQ is a freeware chemical equilibrium model for the calculation of metal speciation, solubility equilibria, sorption etc. for natural waters. It combines state-of-the-art descriptions of sorption and complexation reactions with easy-to-use menus and options for importing and exporting data to/from Excel. Chemical equilibrium modelling has never been easier!
Visual MINTEQ will run on most Windows platforms and relies on .NET Framework. For more details, see here. The current version is 3.1, but an upgrade is in progress, and a new beta version (4.0) can now be downloaded and tested!