HTML-Notepad - HTML WYSIWYG editor for structured documents

PE Explorer - EXE Editor, Resource Editor, Disassembler, Section Editor, Dependency Scanner, Quick Function Syntax Lookup. Analyze win32 executable files, including headers, procedures, and libraries. Edit icon resources and more.

Notepadqq - Notepadqq is a linux clone (identical application) of Notepad++

Resource Hacker - Resource Hacker has been designed to be the complete resource editing tool.

TED Notepad - TED Notepad is a portable text editor software that deals with a large variety of text processing tools, supplemental text clipboards, high accessibility through hotkeys, and a customizable number of settings and options.

IDA - The best-of-breed binary code analysis tool, an indispensable item in the toolbox of world-class software analysts, reverse engineers, malware analyst and cybersecurity professionals.