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A design system is a collection of documentation on principles and best practices, that helps guide a team to build digital products. They are often embodied in UI libraries and pattern libraries, but can extend to include guides on other areas such as 'Voice and Tone'.

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Tags:

• Components: Contains coded patterns and examples.
• Voice & Tone: Provides guidance on how language should be used.
• Designers Kit: Includes a Sketch/Photoshop/Figma/etc. file for designers.
• Storybook: Provides components with relevant stories for React Storybook.

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	Components	Voice & Tone	Designers Kit	Storybook
Alfa-Bank	👍		👍	👍
Alibaba Ant Design	👍	👍	👍	👍
Appear Here Styleguide	👍			👍
Apple Developer Design Guidelines			👍
Artsy Reaction	👍
Atlassian Design Language	👍	👍	👍	👍
Audi UI Kit	👍		👍
Backpack (Skyscanner)	👍		👍
BBC GEL (Global Experience Language)	👍	👍	👍
Blueprint	👍		👍
Bulb Design System	👍	👍
BuzzFeed Solid	👍		👍
eBay Skin	👍
Enigma Boundless	👍
CA Technologies Mineral UI	👍
Cards Binary Design	👍	👍	👍	👍
Cloudflare	👍
City of Boston Fleet	👍	👍
Code School	👍
Co-op Design Manual	👍	👍	👍
Duolingo Design Guidelines	👍		👍
Estonia Country Design Guidelines	👍	👍	👍
Firefox Photon Design System	👍	👍	👍
FutureLearn Pattern Library	👍
GitHub Primer	👍			👍
GitLab Design System		👍	👍
Google Material Design	👍	👍	👍
GOV.UK Design System	👍
Help Scout	👍	👍
Heroku Purple3	👍
Hewlett Packard grommet	👍
HubSpot Canvas	👍	👍
Hudl Design System	👍	👍
IBM Carbon	👍	👍	👍	👍
IBM Design Language	👍	👍
IBM Northstar	👍	👍
Intuit Harmony	👍	👍	👍
JetBrains Ring UI	👍
Lexicon	👍	👍
Lonely Planet Rizzo	👍
Louder Than Ten Manual	👍	👍
Lost My Name Design System	👍
Mailchimp Content Styleguide		👍
Mailchimp Patterns	👍
Marvel Styleguide	👍
Mesosphere CNVS	👍
Microsoft Fluent	👍		👍
Mixpanel Product Styleguide	👍
MongoDB Design System	👍		👍
Monzo Tone of Voice		👍
Morningstar Design System	👍	👍	👍
NHS.UK Service Manual (Alpha)	👍	👍
nib Health Funds	👍
Nordnet	👍	👍		👍
Nutanix Prism	👍
Office UI Fabric	👍
Opattern	👍	👍
Oracle Alta UI	👍
PatternFly Open Interface Project	👍	👍
Pearson UX Framework	👍	👍	👍
Pinterest Gestalt	👍			👍
Pivotal	👍
Pluralsight Design System	👍			👍
Predix Design System	👍	👍	👍
Priceline Design System	👍	👍		👍
Pusher Chameleon	👍
Rambler	👍			👍
Salesforce Lightning Design System	👍	👍	👍
SAP Fiori	👍
SEEK Style Guide	👍
Shopify Polaris	👍	👍	👍
Stack Exchange: Stacks UI	👍
Starbucks Style Guide	👍
Sky Toolkit	👍
The University of Melbourne Design System	👍
Trello - Nachos	👍		👍
Ubuntu Brand Guidelines	👍	👍
USPTO UI Design Library	👍		👍
uSwitch style guide	👍	👍
U.S. Web Design Standards	👍	👍	👍
U.S. CMS.gov Design System	👍
VMware {code}	👍
VMware Clarity Design System	👍	👍	👍
VMware UI Pattern Library	👍		👍
WeWork Plasma	👍
Yelp Styleguide	👍	👍
Zendesk Garden	👍			👍

Notes

Although 'design systems', 'ui libraries', and 'pattern libraries' are different things, they are often used interchangeably. This list contains all three.

Credits

Cover icon: 'Solar System' by Andrejs Kirma from the Noun Project