The new Angular(can’t call it Angular 2 anymore) ecosystem is still evolving. Control libraries start to appear.
Here are some of the libraries I had a look at:
(Don’t ask me which one I prefer, as with all control libraries they have their pros and cons you’ll have to learn to live with…)
Angular Material
Material Design components for Angular apps https://material.angular.io/
Remark: The Angular Material library for Angular >=2 is still rather limited. Don’t confuse it with the Angular 1 variant at https://material.angularjs.org/latest/.
NG-Lightning
Native Angular components & directives for Lightning Design System http://ng-lightning.github.io/ng-lightning/#/
Created by the Salesforce’s guys on top of Angular and Salesforce's Lightning Design System.
TERADATA Covalent
Covalent(https://teradata.github.io/covalent/#/) is a UI Platform that combines proven design language with a comprehensive web framework, built on Angular & Angular-Material (Design).
PrimeNG
PrimeNG(https://www.primefaces.org/primeng/) is a collection of rich UI components for Angular 2. PrimeNG is a sibling of the popular JavaServer Faces Component Suite, PrimeFaces.
Kendo Angular UI
Professional Grade Angular UI Components http://www.telerik.com/kendo-angular-ui/