PilotEdit - PilotEdit Lite is an advanced text and hex editor that supports opening of files larger than 4GB.
Hex Workshop - Hex Workshop: Hex Editor, Sector Editor, Base Converter and Hex Calculator for Windows
HextEdit - HextEdit is a proficient hex editor and disassembler for Mac.
BinHex CryPactor - Manipulate binary and hexadecimal strings!
FlexHex - FlexHEX is a full-featured hex editor designed to edit binary files, OLE compound files, logical devices, and physical drives. With FlexHEX you can inspect, modify, insert, search, or replace binary, ASCII, or UNICODE data.
Hecate - Hecate is the smart hex editor designed for Windows, Mac OS, and Linux.