Numi App - Numi is a beautiful text calculator for Mac.
VATCalculatorUK.co.uk - FREE Online UK VAT Calculator that is able to reverse, remove, include & add VAT. This VAT calculator can calculate product prices both inclusive & exclusive VAT.
Soulver - Soulver is a software application that functions as a calculator that allows you type a continuous stream of information rather than having to input data into multiple cells.
Vatulator - Online VAT calculator
SymCalc - Symbolic Calculator - Math toolbox for iOS. Advanced calculator features with a tape-like history, not requiring internet...
VAT-calculator.uk - Simplest and most Accurate Online VAT Calculator in UK. Easily Add or Remove VAT.