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.
Drafts - Quickly capture text on iOS and send it anywhere
txt.edit - The missing text editor for iPhone & iPad
Cleartext - A text editor that allows only the 1,000 most common words
Adobe Scan - Scan anything into a PDF using your mobile device.
Visual Studio Code - Build and debug modern web and cloud applications, by Microsoft