Web developer resources

HTML/CSS/Javascript
https://developer.mozilla.org/en-US/docs/Web/CSS
https://developer.mozilla.org/en-US/docs/Web/HTML
https://developer.mozilla.org/en-US/docs/Web/JavaScript

Verifying HTML and CSS
To verify HTML: http://validator.w3.org/#validate\_by\_input
To verify CSS: http://jigsaw.w3.org/css-validator/#validate\_by\_input

Flex
https://developer.mozilla.org/en-US/docs/Web/CSS/flex
https://css-tricks.com/snippets/css/a-guide-to-flexbox/

CSS
1. Normalize.css
A modern, HTML5-ready alternative to CSS resets
https://necolas.github.io/normalize.css/

Place holder Images
Quick & simple image placeholders.
https://placeholder.com/
Sample:

Font
https://fonts.google.com/

Frameworks
Bootstrap: http://getbootstrap.com/
Foundation: http://foundation.zurb.com/
Yaml: http://www.yaml.de/
960 Grid: http://960.gs/
Susy: http://susy.oddbird.net/