010 Editor
6.6#4 in hex editorsLinuxmacOSWindows
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010 Editor suits people working with text, binary formats, or file analysis, including digital forensics, malware analysis, memory and process analysis, and data recovery. It is available across Linux, macOS, and Windows, but process editing requires Windows.
Hexer suits Linux users who want a free, source-built binary editor with a vi/ex-style interface. It is intended for Unix-like and POSIX-compatible environments.