HTML-Notepad - HTML WYSIWYG editor for structured documents
Hex Workshop - Hex Workshop: Hex Editor, Sector Editor, Base Converter and Hex Calculator for Windows
Notepadqq - Notepadqq is a linux clone (identical application) of Notepad++
PilotEdit - PilotEdit Lite is an advanced text and hex editor that supports opening of files larger than 4GB.
iNotepad - Write and organize all your texts and notes on Mac.
BinHex CryPactor - Manipulate binary and hexadecimal strings!