optionscat
European options tool, compound calc, finance manager for traders...
... awarded the 1997 Nobel Prize in Economics for their work in finding a new method to determine the value of derivatives (the Nobel Prize is not given posthumously; however, the Nobel committee acknowledged Black's role in the Black-Scholes model).
Read more: Options Pricing: Black-Scholes Model| Investopedia http://www.investopedia.com/university/options-pricing/black-scholes-model.asp#ixzz4T9rfuUyJ