http://www.chmaas.handshake.de/delphi/freeware/xvi32/xvi32.htm

Free ware Hex file editor.

The following is an excerpt from the download page above:

Features
XVI32 has the following main features. Especially note the highlighted advantages of XVI32.

    * data inspector to view decoded numbers (see screen shot; can be turned off).
    * Has built-in script interpreter.
    * Easily works with huge files. Try to open a 60 MB sized text file with some other hex editor (not to speak about Wordpad), then use XVI32... If you don't have such a huge text file, use my freeware tool RndFile to create one
    * XVI32 allows to edit files up to 2 GB (enough virtual memory provided, of course)
    * For your convenience, XVI32 stores settings and last used search strings etc. in XVI32.INI file
    * Progress indication in percent for most operations
    * You can abort nearly all operations (reading/writing files, search, replace, print...)
    * Display of both text (ASCII/ANSI) and hexadecimal representation
    * Two synchronous cursors in text and hex area
    * Fully resizeable window (change number of rows and columns)
    * Font and font size adjustable
    * Overwrite or insert characters
    * Insert text or hex string n times
    * Switch byte offset (address) of first byte between 0 or 1 to examine also record structure of plain text files
    * Search text or hex string, e.g. find "this text" or find "0D 0A"
    * Simplified search for Unicode Latin (UTF-16) strings
    * Search optionally with joker (wildcard) char that will match any character, e.g. find "A.C" or "00 2E 2E 00" where "." = "2E" (user-defined) stands for any character
    * Fast searching algorithm (Quicksearch) for both search directions (down/up)
    * Count occurences of text or hex string
    * Replace text or hex string, e.g. replace "0D 0A" by "0A" or replace "0D 0A" by text "EOL"
    * Extremely fast "replace all" mode (if needed, additional memory is allocated beforehead, not at every single replacing operation)
    * Auto-fill feature to copy bytes from current address into input field for hex string using right arrow key
    * Character conversion using self-defined character table
    * Easy converting of text to hex string in dialogs (e.g. "abc" -> "61 62 63")
    * Decoding and encoding of 1, 2, 4, and 8 byte integers or 4/8 byte floats in 2 possible byte orders
    * Bit manipulation (view or set bits)
    * Open file in Read Only Mode (e.g. if opened by another application or to avoid unintentional modifications)
    * Insert file contents into file
    * Write block to file
    * Copy, move or delete block
    * Clipboard support
    * Goto address (absolute or relative up/down)
    * Up to 9 named bookmarks
    * Enter jump width and jump up/down (useful for files with fixed record length)
    * Patch BORLAND PASCAL 7.0 EXE files for execution on processors > 200 MHz
    * Printing with preview or print to file
    * Simplified search for Unicode Latin (UTF-16) strings
    * Wheel mouse support
    * Command "Reload" to open current file again
    * Easily access most recently used files
    * No setup programm needed, doesn't write any data to registry
    * And last, but not least: XVI32 is free!

What's Ray? Chopped chicken liver?