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.

Hex Workshop - Hex Workshop: Hex Editor, Sector Editor, Base Converter and Hex Calculator for Windows

Binary Ninja - A reverse engineering platform and GUI

PilotEdit - PilotEdit Lite is an advanced text and hex editor that supports opening of files larger than 4GB.

PE Explorer - EXE Editor, Resource Editor, Disassembler, Section Editor, Dependency Scanner, Quick Function Syntax Lookup. Analyze win32 executable files, including headers, procedures, and libraries. Edit icon resources and more.

BinHex CryPactor - Manipulate binary and hexadecimal strings!