1. iOS Human Interface Guildeline —— Apple（苹果）

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

2. Material Design —— Google（谷歌）

https://material.io/guidelines/
http://design.1sters.com/

Material Components

https://material.io/components/

3. Fluent Design System —— Microsoft（微软）

https://fluent.microsoft.com/

Microsoft Design （包括Fluent Design 和 Inclusive Design等）

https://www.microsoft.com/en-us/design

4. IBM设计语言 —— IBM

https://www.ibm.com/design/language/

5. Photon Design System —— Firefox（火狐）

https://design.firefox.com/photon/welcome.html

Ant Design —— 蚂蚁金服

https://ant.design/index-cn
https://motion.ant.design/
https://mobile.ant.design/index-cn