HxD - HxD is a carefully designed and fast hex editor which, additionally to raw disk editing and...
HextEdit - HextEdit is a proficient hex editor and disassembler for Mac.
WinHex - WinHex hex editor, disk editor, RAM editor. Binary editor for files, disks, and RAM. Download HEX EDITOR. Sector editor. Drive editor.
BinHex CryPactor - Manipulate binary and hexadecimal strings!
iHex - iHex is the premier hex editor and data analysis tool for Mac OS X.
DHEX - Themeable hex editor with diff mode for tracking file changes.