Notepad++ - A free source code editor which supports several programming languages running under the MS Windows environment.
OmPad - OmPad is a free, simple, powerful, beautiful and minimal writing app that helps you focus and...
Smultron - Smultron is an elegant and powerful text editor for macOS that is easy to use.
Scribes - A text editor for GNOME that combines simplicity with power.
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.
Caret - Better Markdown Editor for Mac / Windows / Linux