Notepad++

Description: Notepad++ is a free (as in “free speech” and also as in “free beer”) source code editor and Notepad replacement that supports several languages. 
Interface: Windows GUI
License: GNU General Public License
Functions: Text and source code editor
Homepage
Platforms: Windows x32 x64 ARM64
Commentary: Great text editor, supports command-line options, and many plugins.
Usage Example: run the app, portable

Screenshot: