HxD, PE Explorer, 010 Editor, Okteta, ImHex, DMDE, RJ TextEd, iHex, HexEd.it, Hexinator, Free Hex Editor Neo, MadEdit, XVI32, Hex Fiend, Kaitai Struct, Active@ Disk Editor, Hex Workshop, Preon, wxHexEditor, Heraia, Hexplorer, Hecate, Hexer are some alternatives to WinHex.