Sicyon - Version 3.0 A freeware tool for everyone dealing with sci/eng formulae. The core of Sicyon is an expression calculator and the principal features are: estimate a function using variables, user-defined functions and over 50 built-in functions; tabulate or plot a function; find real roots, minimums, maximums and definite integral of a function; sophisticated units converter; database reader with various physical and chemical constants; curve fit; various tools as add-in applications.