Must Read
Building Social: A Case Study On Progressive Enhancement
Through this case study on redesigning the Building Social website, you will learn some simple yet often overlooked front-end techniques that defer the use of JavaScript as much as possible, while providing some neat JavaScript enhancements, too.
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An Introduction to Chart.js 2.0 — Six Simple Examples
An introduction to a JavaScript charting library called Chart.js. Using six stylish examples, you will learn how to use Chart.js to visualize data on your website, as well as configure it to meet your needs.
A few HTML tips
Some tips and advice about HTML code. Some of this guidance will be best suited for beginners but there is also a discussion of SVG sprites for icons, a somewhat more advanced topic.
A Baseline for Front-End [JS] Developers, 2015
A good article about a baseline of front-end development tools and things to do and learn (according to the author).
Creating Universal Windows Apps With React Native
With the React Native Universal Windows platform extension, you can now make your React Native applications run on the Universal Windows families of devices, including desktop, mobile, and Xbox, as well as Windows IoT, Surface Hub, and HoloLens.
19 Tips For Everyday Git Use
The author shares the most practical tips that he has learned through out his 4+ years of git.
Tools & Code

Measure Web Performance
A small (1.1kb) library for measuring things in your web app and reporting the results to Google Analytics.