by PalmarySoft. Ltd PalmaryCalc from a simple to a scientific calculator with different input methods, conversion functions, credit, base number conversions, integer math calculations , logical and bit-manipulation operations, currency conversion
by cliptorrent.com BiScope is free educational software, that allows you to visually explore the relationship between binary, hexadecimal, octal and decimal numbers. BiScope also serves as a base conversion calculator.
by Bernstein Software A very powerfull and simple to use numeric editor. It allows you to edit any file in any base between 2 and 255 including binary, octal, decimal and hexadecimal. NumEdit includes tools to convert values from one base to another.