Q:

Alternative for KendoUI in Angular 4

I am working on a project using:

Web API 2
Angular 4

I want to choose a framework for GUI.  I thought about "Telerik KendoUI for Angular" which is really a good lib.  But Bootstrap 4 is the only version whose supported from this version of Kendo.  My company has a design made in Bootstrap 3, so they don't want to change it. 
The question is: is there any other Lib for GUI like KendoUI we can use them?  
or is there a tool or something to convert a file from Bootstrap 3 to Bootstrap 4? 
Thank you. 

A:

There are plenty of other UI component libraries available for angular. 
primeng
https://www.primefaces.org/primeng/
vmware
https://vmware.github.io/clarity/documentation
ngSemantic
https://ng-semantic.herokuapp.com/
You can find a list of other UI components here as well:
https://angular.io/resources/

