Where can I get a hexadecimal or binary calculator?
IntCalc for Mac OSX by InerTron Software
The Hex Workshop Hex Editor by BreakPoint Software is a complete set of hexadecimal development tools for Microsoft Window. Hex Works… | Modern words, Workshop, Hex
Can I convert hex to decimal using the calculator app? - Ask Ubuntu
BCalc — A Hex/Bin/Dec Converter And Calculator – Kerry D. Wong