WinHex is a hexadecimal editor for Windows 95/98/Me/NT/2000/XP with a lot of features:

* Disk editor (logical & physical, supports FAT16, FAT32, NTFS, and CDFS) * RAM editor - a means to edit other processes' virtual memory * Data Interpreter, knowing 19 data types * Editing data structures using templates * Concatenating, splitting, unifying, analyzing, and comparing files * Particularly flexible search and replace functions * Automation of file editing * Sophisticated undo mechanism * Drive imaging & drive cloning * 128-bit encryption, MD5, 256-bit digests, CRC32, checksums * Import of all clipboard formats * Conversion formats: Binary, Hex ASCII, Intel-Hex, and Motorola-S * Printing * Deleting files irreversibly (e.g. such with confidential contents) * Instant window switching * Random-number generator * Complete online help and much more

WinHex has minimal system requirements, operates very fast, needs little memory and is easy to use. An excellent computer forensics tool.