Screencastify - Free screen recorder extension for Chrome. Capture, edit and share screencasts. No software download required. Works on Mac, Windows and Chromebooks. Screen RecorderFree screen recorder for Chrome.
AT-UI - UI library for developing powerful web interfaces
SketchCasts - A weekly screencast, all about how to use Sketch
Remake - A way to make web apps with just HTML & CSS
GoRails - Ruby on Rails screencasts for Web Developers
Sketch Extensions - An official collection of Sketch extensions & plugins