- Atom Plugins
- For Experimenting codepen.io
- MDN documentation
- w3schools
- Alternative reference devdocs.io
- HTML Cheatsheet by Stanford University
- CSS Cheatsheet from Stanford University
- colour palettes on colorhunt.co by experts
- Download z-index Stacking Order Flowchart
- Free vector icons
- CSS Button Generator
- Pesticide extension for chrome