Anima App - Design, get feedback, convert to code, publish, iterate.
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.
Timeline for Sketch - Create beautiful timeline animations in Sketch
SketchCasts - A weekly screencast, all about how to use Sketch
Invision - Prototyping and collaboration for design teams
GoRails - Ruby on Rails screencasts for Web Developers