Sketch 42
Now with export presets, touch bar integration, and more
17 Alternatives To Sketch 42

Base UI Sketch Framework
Huge set of everything you need to design and prototype

InVision V7
Two years in the making, rebuilt from scratch.
Monsters for Sketch
Create your own monster character in seconds.

Rawson Framework
Create amazing Sketch apps for iOS
Shared Text Styles
Easily import and export your Text Styles in Sketch.
Volupedia
A Wikipedia mirror powered by Sketchfab 3D previews

Wake Free
A free design visibility tool for product teams