UI Design System - Starter kit for Sketch to create awesome user interfaces.
Adobe XD - Adobe XD is an all-in-one UX/UI solution for designing websites, mobile apps and more.
Design Systems Repo - A collection of design system examples and resources
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Symbol Design System - Advanced web-design system based on Sketch nested symbols.
Slack - A messaging app for teams who see through the Earth!