A very nice free and fast hex-editor HxD
HxD Hexeditor README

- Instant opening regardless of file-size
(>4GB is no problem, if it fits on a disk/drive you can open it)
- Fast searching: forward, backwards or from beginning
- Replace function (fast even for millions of edits)
- Disk-Editor: RAW reading and writing of disks and drives (WinNT and Win9x)
- RAM-Editor: can read and write virtual memory of other processes
- Data-folding for better overview in RAM-Editor
- Splitting and joining files
- Safe deletion of files (shredder)
- File compare (simple version for now)
- Inserting bytes or filling a selection with a pattern
- Grouping of bytes
- Only text or only hex mode
- Exporting of data to source code (Pascal, C, Java)
or as formatted output (plain text, HTML, Richtext, TeX)
or to hex formats
Motorola S19 Records, Motorola S28 Records, Motorola S37 Records,
16 Bit Intel Hex, 20 Bit Intel Hex, 32 Bit Intel Hex
- Checksum-Generator:
Checksum-8, ..., Checksum-32, CRC-16, CRC-16 CCITT,
CRC-32, Custom CRC, SHA-1, SHA-256, SHA-384, SHA-512, MD-2, MD-4, MD5
- Statistical view:
Graphical representation of the character distribution.
Helps to identify the data-type of a selection.
- Support for ANSI, DOS/IBM-ASCII and EBCDIC charsets
- Unlimited undo
- Modified data is highlighted
- Internet update checker
- Ghost caret: displayed around the corresponding character/hex value on the
inactive column, the caret is placed on the active column
- Printing
- Bookmarks:
Ctrl+Shift+Number(0-9) sets a bookmark,
Ctrl+Number(0-9) goes to a bookmark
- Flicker free display and fast drawing

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