Emberx-select

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Emberx-select demo',
  xSelectValue: 'bob',
  actions: {
    setXSelect(value) {
      this.set('xSelectValue', value);
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>

{{#x-select value=xSelectValue action="setXSelect"}}
  {{#x-option value="fred"}}Fred Flintstone{{/x-option}}
  {{#x-option value="bob"}}Bob Newhart{{/x-option}}
{{/x-select}}

<p>x-select value: {{xSelectValue}}</p>

twiddle.json

{
  "version": "0.8.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.5.1",
    "ember-data": "2.5.2",
    "ember-template-compiler": "2.5.1"
  },
   "addons": {
    "emberx-select": "2.1.2"
  }
}