FinanceFour 4+

FinCalc is a comprehensive financial calculator with five separate calculators, including: a car finance calculator; a home finance calculator; a retirement calculator; a living annuity calculator (e.g. living off of your savings at retirement); and a standard finance calculator.

OptionGreeks provides you with option (derivatives) pricing and analysis, including the "greeks" (sensitivity of option price to a range of underlying parameters). It not only analyses "long" and "short", "call" and "put" options, but also a range of option strategies.

StatsNoisy gives you extensive information on the probabilities of underperformance of a range of managers and / or funds, under certain assumptions of skill (or lack thereof). It will allow you to appreciate the statistical "noise" in investment performance, to help you make better investment decisions through education and understanding.

SATax provides you with the latest tax rates, brackets and rebates for South African individuals, including the tools to compare these to previous six years. It calculates tax payable (based on taxable income) as well as marginal and effective rates based on your age.