Base UI Sketch Framework - Huge set of everything you need to design and prototype
SketchCasts - A weekly screencast, all about how to use Sketch
INSTAD.IO - Automagically converts vector images into sketchy style
UiSketcher - Easily sketch user interface with your pen-enabled device!
Graphcool - The GraphQL backend for mobile & web developers to build better apps faster ⚡️
Remake - A way to make web apps with just HTML & CSS