Physics/Chemistry/Math software

[Guest Crispy]

I would very much like to see some physics/chemistry/math programs for the Smartphone platform.

Im thinking as such functions like automatic calculation of pH, automatic creating of Bjerrum diagrams from pKs values, Molecule models, advanced graph creating capabilities, minilex of most used equations and info etc.

A perfect payware app! :)

PS: If something like this already exists, please drop a link, thx!