Fiori Design
https://experience.sap.com/fiori-design-web/
Lightning Design System
https://www.lightningdesignsystem.com/getting-started/
Atlassin Design
https://atlassian.design/
The Harmony Design System
http://harmony.intuit.com/
Carbon Design System
http://carbondesignsystem.com/
Ant Design
https://ant.design/index-cn / https://pro.ant.design/index-cn / https://mobile.ant.design/index-cn / https://antv.alipay.com/zh-cn/index.html
Element
http://element.eleme.io/#/zh-CN
iView
https://www.iviewui.com/docs/guide/introduce
Bulma
https://bulma.io/
Vue - Blue
https://chenz24.github.io/vue-blu/#/
UIkit
https://getuikit.com/docs/introduction / http://getuikit.net/docs/core.html
Website Style Guide Resources
http://styleguides.io/examples.html
Web Themes & Templates (Envato Market)
https://themeforest.net/category/site-templates/admin-templates
