Visual Studio Code
I recently switched to this code editor and I'm completely in love! See the next resource for my setup.
My Visual Studio Code Setup
Check out exactly what theme, extensions and settings I use for VSCode in the coding videos of "Advanced CSS and Sass".
Brackets Text Editor
The text editor I used in my HTML/CSS and JavaScript courses. The theme I used was OS X Style | Flat & Dark.
Codepen
Codepen has become an essential tool for me to quickly test out some ideas or do some tests. I use it in my advanced CSS course.
Emmet Cheat Sheet
Emmet is an essential tool for writing HTML. I teach it in my advanced CSS course. This is a very handy cheat sheet to get started.