Embracing Fluid Typography— Unlike responsive typography, which changes only at set breakpoints, fluid typography resizes smoothly to match any device width. Michael Riethmuller
How to Add Secure Authentication to iOS Apps [Video Tutorial]— Join Stormpath iOS Evangelist Edward Jiang for an on-demand authentication tutorial. You'll learn to implement token-based authentication with OAuth2, how to integrate social login using the Stormpath SDK, and find code samples to make it easy. Stormpath
Angular Mobile Toolkit— A tool for automatically creating progressive web apps using plugins for App Shell, Service Worker and Application Manifest. Angular
Building the F8 App with React Native— A series of tutorials designed to introduce React Native, written alongside the building of the F8 2016 app for Android and iOS. Makeitopen.com
Brian Rinaldi recommends
Responsive Images with Jekyll— Based on a JekyllConf presentation, shows how to implement responsive images with Jekyll and imgix. Oliver Pattison