Editors Hex Editors
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AXARScan - Windows or DOS program with text extractor, bit editor, search, and multi-level undo.
Catch22 HexEdit 1.2 - Cut, copy, paste, insert and delete data with no decrease in performance with larger files and unlimited multi-level undo and redo capability. For Microsoft Windows, and has maximum file size limit of 4Gb.
DataWorkshop - A multiplatform binary data editor with support for user defined structures. Requires Java. [Windows, Linux, MacOS]
febooti Hex Editor - A Hex Editor designed for integration into Windows properties pages.
1Fh - Fast opening and editing of large binary files.
Frhed - Small Windows executable that supports large file size, drag-and-drop editing, and direct editing of binary values. [Open Source]
Hack - A hex editor in which you can write REXX script to do whatever modification you want. [Public domain]
HexStar Version 2.11 - A free hex editor for Windows NT and 2000 with many useful features. Able to work with extremely large files, depending on user's virtual memory.
XVI32 - Windows program that includes complete online help and requires less than a megabyte of hard disk space. Help build the largest human-edited directory on the web.