Completely free. Calculates takehome wages from entered salary or raise. This is based on the 2010-2011 tax year and accommodates the new 50% tax rate as well as student loans. Salaries can be entered on an annual, monthly, weekly, daily or hourly rate.
The application calculates the taxable income, tax amount, national insurance amount, and the student loan repayment ad makes all deductions to show your takehome wages.
Saw this app and thought of you guys. I haven't tried it out personally but the reviews seem quite good.