Sketch Repo - Collection of resources for anyone who uses Sketch
Now UI Kit - A beautiful Bootstrap 4 UI kit. Yours free.
Charts by ls.graphics - The most comprehensive collection of charts for Sketch
Dashboard UI Kit - A modern & responsive dashboard UI kit for designers.
Gmail Add-on Design Kit - A simple Sketch library to speed up Gmail Add-on designs
Bots UI Kit - Fully customizable Sketch UI Kit for Messenger Platform