DevDocs - Open source API documentation browser with instant fuzzy search, offline mode, keyboard shortcuts, and more
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.
Zeal - Zeal is an API Documentation Browser.
SketchCasts - A weekly screencast, all about how to use Sketch
Loom - Loom is a screen recording extension for Chrome that gives people the ability to create and share media. Create your own videos using your camera, screen view, and audio. Read more about Loom.
GoRails - Ruby on Rails screencasts for Web Developers