Material Design by Google https://material.io/design

Airbnb https://airbnb.design/building-a-visual-language/

Apple https://developer.apple.com/design/

Meta (Facebook) https://design.facebook.com/

Uber https://baseweb.design/

Shopify https://polaris.shopify.com/

Microsoft https://www.microsoft.com/design/fluent/#/

IBM https://carbondesignsystem.com/

MailChimp https://mailchimp.com/design/

Salesforce https://www.lightningdesignsystem.com/

Audi https://www.audi.com/ci/en/guides/user-interface/introduction.html

Buzzfeed https://solid.buzzfeed.com/

Atlassian https://atlassian.design/

HelpScout https://style.helpscout.com/

Microsoft Teams app: https://docs.microsoft.com/en-us/microsoftteams/platform/concepts/design/design-teams-app-fundamentals

REI Cedar: https://cedar.rei.com

-Take common practices and catalog them into a new UI.

-Find differences between design systems and notate them.