Free Hex Editors
XVI32
This is a freeware hex editor for the various flavors of Windows. According to the website there is no setup needed, and it does not add anything to the registry.
Hackman
Hackman is a freeware hex editor and disassembler. It comes with cryptography capabilities, decoding with ready and self-made algorithms and a fully-featured editor.
Cygnus Hex Editor FREE EDITION 1.00
This is the Lite or free version of a commercial product. See the website for a comparison of which features available in the commerical version are not available.
Hex Editor
Hex Editor product family is a set of file editing tools for Windows with advanced binary editing capabilities. Basic features include data editing, exchanging data with other applications through the Clipboard, inserting new data and deleting existing data, and others. Advanced features include multiple selection, powerful Find All and Replace All commands, Goto and Fill commands, Bookmarks and printing capabilities.
1Fh Binary/Hex Editor
1Fh is program for fast opening and binary editing files regardless the size. It is capable of displaying file in machine code and in hex code. Current version is 1.05
Hexplorer
Binary (hexadecimal) editor for Windows
fb
A Linux/UNIX (and Windows 95, 98, and NT) utility for the viewing and editing of binary files.
Frhed
Frhed is a native 32 bit Hex editor.