BATE pH calculator
BATE calculates pH of solutions containing mixtures of acid and base with up to 4 dissociation steps and titration curves for these acids and bases. Ionic strentgh can be calculated from the dissociated forms concentrations, omitted or forced upon the solution. ... Titration printouts contain titration curves for both titrations (acid/base and base/acid) and pH of all end points. ... Very low hardware requirements - if your Windows start, BATE will work. ... Extensive tutorial and help. ... Built in calculator allows easy calculation of molar masses and concentrations for a given substance...
http://www.chembuddy.com/files/BATEInstall.exe - 363Kb - Download - Screenshot

CurTiPot Acid-Base pH and Titration
CurTiPot is a powerful all-in-one freeware for acid-base equilibria calculations such as pH of aqueous solutions, dissociation degree of weak and polyprotic systems, pKa determinations, simulation of titration curves and analysis of real titration data with chemometric tools like interpolation,... Valuable for teaching, generation of unlimited titration exercises and evaluation of the feasibility and accuracy of new titrations. ... - Simulation and overlay of acid-base titration curves of any complexity, without or with simulated random experimental error in pH and/or volume.
http://www2.iq.usp.br/docente/gutz/curtipot/curtipot_.zip - 305Kb - Download - Screenshot