I apologize I have yet to create any documentation for my Options Pricer.
The calculators models are mostly from two libraries:
Financial Numerical Recipes in C++ (Bernt Arne Oedegaard).
See PDF http://finance.bi.no/~bernt/gcc_prog/recipes/recipes.pdf
Metaoptions (Bjorn Augestad)
I think Espen Haug's book, "The Complete Guide to Option Pricing Formulas" complements the calculator very well.
My website http://opensourcefinancialmodels.com provides a Windows installer and Linux autotools tar ball. Even the Windows version includes full source code.
You can view any model source code from the calculator via File -> Source View.
You can also export to text file via File -> Text Export.
I'm open to ideas and suggestions!