HxD, WinHex, 010 Editor, Okteta, Hex Edit, ImHex, Bless, iHex, Hiew, 0xED, HexEd.it, Hexinator, Free Hex Editor Neo, MadEdit, XVI32, VBinDiff, Kaitai Struct, Active@ Disk Editor, Hex Workshop, Batch Hex Editor, wxHexEditor, Heraia, BinHex CryPactor, Hexplorer, Hecate, Hexer, FlexHex are some alternatives to Hex Fiend.