Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.

Brackets - A modern, open source text editor that understands web design

WD Officepad - A simple note-taking application for windows, designed in beauty, but built for 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.

Note Everything - A note (notepad) application where you can create text-, voice- and paint-notes.

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