Styleguides

Python

• PEP 8 - Style Guide for Python Code
• PEP 257 – Docstring Conventions
• Google Python Style Guide
• Django Coding style

Frontend

JavaScript

• Google JavaScript Style Guide
• Node.js Style Guide

HTML/CSS

• Google HTML/CSS Style Guide
• Code Guide by @mdo — Standards for developing flexible, durable, and sustainable HTML and CSS

URL

• URL Structure

SASS

• SASS Style Guide
• My Current CSS and Sass Styleguide

Documentation

JavaScript

• JavaScript Reference
• JavaScript and HTML DOM Reference
• Gamepad — Gamepad API

Python

• The Python Language Reference
• The Python Standard Library
• Django

Sass

• Sass — Sass is the most mature, stable, and powerful professional-grade CSS extension language in the world