Hex Workshop - Hex Workshop: Hex Editor, Sector Editor, Base Converter and Hex Calculator for Windows
HextEdit - HextEdit is a proficient hex editor and disassembler for Mac.
BinHex CryPactor - Manipulate binary and hexadecimal strings!
DHEX - Themeable hex editor with diff mode for tracking file changes.
Hecate - Hecate is the smart hex editor designed for Windows, Mac OS, and Linux.
iHex - iHex is the premier hex editor and data analysis tool for Mac OS X.