Notepad++ - A free source code editor which supports several programming languages running under the MS Windows environment.

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

Atom - At GitHub, we’re building the text editor we’ve always wanted: hackable to the core, but approachable on the first day without ever touching a config file. We can’t wait to see what you build with it.

Sublime Text - Sublime Text is a sophisticated text editor for code, html and prose - any kind of text file. You'll love the slick user interface and extraordinary features. Fully customizable with macros, and syntax highlighting for most major languages.

Visual Studio Code - Build and debug modern web and cloud applications, by Microsoft

Notepad - Most simple text editor. Just plain text, saves in .txt format.