HexEdit/2 1.04 is now available as open source software under the GNU GPL V3 license.
With HexEdit/2, you can view and edit files in single or multibyte octal, decimal, or hexadecimal binary representation. You can resize an existing file or allocate a new file from scratch, and perform search and replace functions forward or backward through the file.
Download: http://hobbes.nmsu.edu/h-search.php?key=HexEdit2_1-04.zip
GitHub: https://github.com/OS2World/APP-EDITOR-HexEdit2
URL: http://www.os2world.com/wiki/index.php/HexEdit/2
Special thanks to Bennett C. Baker for released the source code of this software.