Designing Beautiful REST APIs : https://github.com/nbarbettini/BeautifulRestApi
Microsoft API Guidelines : https://github.com/Microsoft/api-guidelines/blob/vNext/Guidelines.md
Adding Push Notifications to a Web App : https://developers.google.com/web/fundamentals/codelabs/push-notifications/
Identity Server : http://identityserver.io/
https://github.com/airbnb/css
https://github.com/bevacqua/css
https://glennmccomb.com/articles/useful-sass-scss-media-query-mixins-for-bootstrap/