HTML element reference from mozilla.org

HTML reference sheet

Tutorial: HTML + CSS from w3.org - QUICK START

CSS reference from mozilla.org

CSS reference sheet from smashingmagazine.com

Flask Quickstart tutorial - QUICK START

Flask users guide

Jinja template language

Flask video tutorial

Learn Python in 10 minutes tutorial by Stavros Korokithakis - QUICK START

The Python Tutorial tutorial from python.org

Python standard libary reference from python.org

Python 2.7 tutorial

Python Anywhere

Tornado user's guide

Video: Gavid Roy explains the Tornado IOLoop from youtube.com

A re-introduction to JavaScript tutorial from Mozilla - QUICK START

JavaScript reference from mozilla.org

JQuery API

JQuery UI Demos

SQL as understood by SQLite

CrowdLib

boto.mturk

LegionTools

Python and Real-time web article by Serge Koval

Tornado

Tornado – User's guide - Start with #2 (Asynchronous...) and #3 (Coroutines)

Understanding the code inside Tornado, the asynchronous web server

SockJS-client (JavaScript library)

SockJS-tornado (Python server component)