Hex Fiend!

HxD is a carefully designed and fast hex editor which, additionally to raw disk editing and modifying of main memory (RAM), handles files of any size.

wxHexEditor is an open source cross-platform disk/sector/file hex editor written in C++ with a wxWidgets-based user interface.

WinHex is a hexadecimal editor capable of opening disks, sectors, files (native support for FAT, NTFS, Ext2/3, ReiserFS, Reiser4, UFS, CDFS, UDF) and physical memory (RAM). It can read, write and extract data for a further forensic analysis.

MadEdit is an Open-Source and Cross-Platform Text/Hex Editor written in C++ and wxWidgets.

HexEdit is a hexadecimal file editor for Microsoft Windows. HexEdit allows the user to view and edit any type of file, no matter what format it is saved in.

010 Editor is a professional text/hex editor designed to edit any file, drive, or process on your machine. Using Binary Templates technology, 010 Editor allows a binary file to be parsed into a data structure that can be understood. Features an editor with standard Cut, Copy, and Paste commands, support for huge files, and unlimited Undo and Redo for all editing operations. Use the Inspector to easily edit data in a number of different formats.

0xED is a native OS X hex editor based on the Cocoa framework.

Okteta is a simple editor for the raw data of files. This type of program is also called hex editor or binary editor. The data is displayed in the traditional view with two columns: one with the numeric values and one with the assigned characters. Editing can be done both in the value column and the character column. Besides the usual editing capabilities Okteta also brings a small set of tools, like a table listing decodings into common simple data types, a table listing all possible bytes with its character and value equivalents, a info view with a statistic and a filter tool. »

Bless is a high quality, full featured hex editor. It is written in mono/Gtk# and its primary platform is GNU/Linux. However it should be able to run without problems on every platform that mono and Gtk# run on.

The Hex Workshop Hex Editor by BreakPoint Software is a complete set of hexadecimal development tools for Microsoft Windows 2000 and later. Hex Workshop combines advanced binary editing and data interpretation with the ease and flexibility of a modern word processor. With the Hex Workshop, you can edit, cut, copy, paste, insert, fill and delete binary data. You can also work with data in its native structure and data types using our integrated structure view and smart bookmarks. Data editing is quick and easy with our extensive features that allow you to: jump to file or sector location, find or replace data, perform arithmetic and logical operations, binary compare files, generate checksums and digests, view character distributions and export data to RTF or HTML for publishing. »

XVI32 is a freeware hex editor. XVI32 has the following main features. * data inspector to view decoded numbers * Has built-in script interpreter. * Easily works with huge files. * 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 (portable) * Progress indication in percent for most operations * You can abort nearly all operations (reading/writing files, search, replace, print...) And many other features... »

Lightweight HEX-Editor

You got a binary file and don't know its contents. Or some software creates binary files where you have a specification but don't want to decode them manually.