UI Bootstrap is an extended bootstrap framework in an angular way.
Bootstrap components written in pure AngularJS by the AngularUI Team
These are built by the AngularUI team that adds many components to extend Angular. The UI Bootstrap doesn't use jQuery and are directives built from the ground up for each of the Bootstrap JS components.
UI Bootstrap Directive List
Steps to Installation to Angular
Read More : https://angular-ui.github.io/bootstrap/#/getting_started