SketchTool - Export pages & slices out of .sketch docs using CLI
Base UI Sketch Framework - Huge set of everything you need to design and prototype
Sketch Extensions - An official collection of Sketch extensions & plugins
SketchCasts - A weekly screencast, all about how to use Sketch
YayText! - ๐ข๐พ๐น๐ฎ๐ป ๐ฌ๐ธ๐ธ๐ต ๐พ๐ท๐ฒ๐ฌ๐ธ๐ญ๐ฎ ๐ฝ๐ฎ๐๐ฝ ๐ถ๐ช๐ฐ๐ฒ๐ฌ
UiSketcher - Easily sketch user interface with your pen-enabled device!