We have passionately developed UnRisk minimizing model & method risk. But our commitment is not only avoiding, it is responsibilty and transparency. The following technical papers give an overview on principle approaches:

Numerical Methods In UnRisk
Calibration Of Interest Rate Models
Calibration Of Equity Models
Parameter Estimates
Valuation Of Convertible Bonds
Valuation Of Interest Rate Instruments
Valuation Of Credit Default Swaps
Valuation Of Equity / FX Instruments
Valuation Of Credit Derivatives