Buno - Simple Note Taking - Simple, minimal & easy note-taking
Notepad++ - A free source code editor which supports several programming languages running under the MS Windows environment.
Text Case - Format any raw text on iOS and more 📝
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.
Chars - Unicode Symbols Keyboard for iOS
Visual Studio Code - Build and debug modern web and cloud applications, by Microsoft