Hex Workshop - Hex Workshop: Hex Editor, Sector Editor, Base Converter and Hex Calculator for Windows
IDA - The best-of-breed binary code analysis tool, an indispensable item in the toolbox of world-class software analysts, reverse engineers, malware analyst and cybersecurity professionals.
HextEdit - HextEdit is a proficient hex editor and disassembler for Mac.
Okteta - Okteta is a simple editor for the raw data of files.
BinHex CryPactor - Manipulate binary and hexadecimal strings!
DHEX - Themeable hex editor with diff mode for tracking file changes.