Mortgage-UK calculates the true cost of UK mortgages and allows you to compare mortgages and the effect of different interest rates and overpayments. It is designed for the UK market, but may work for other country's mortgage systems.

TaxMe-UK provides a break-down of the tax and other deductions on your UK salary. Just configure your personal details, and those of your partner, to see how much income tax, national insurance etc you are paying. Then configure details of your pensions and other deductions to give an overall picture of your net income.