Efficient binary-decimal & decimal-binary conversion routines for IEEE
Byte CALculator for storage conversions and calculations
Command-line calculator and libray.
Precision Trigonometry: Advanced Calculator for Complex Math
Binary to decimal in C
galculator is a scientific calculator in algebraic mode and RPN
Do you need a decimal, a binary, a octal and a hexadecimal converter?
powerpc disassembler/assembler
An arithmetic calculator for the most popular numerical systems.