InVision Design System Manager - Create and maintain your design system at scale.
Design Systems Repo - A collection of design system examples and resources
Venus Design System - Venus - Design System tool is a Complex & Premium Design System with more than 2000+ components states, 250+ Global Styles & many more features!
Design Principles - An open source repository of design principles and methods
UI Design System for Mobile - Design awesome mobile apps with this starter kit for Sketch.
Eva Design System - A free customizable design system