http://stackoverflow.com/questions/39800103/sticky-footer-in-ember

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

styles.app.css

#wrapper {
    min-height: 100%;
    overflow: auto;
}

#footer {
    position: absolute;
    bottom: -3px;
    left: 2px;
    right: 2px;
    height: 50px;
    background-color: rgba(0, 0, 0, 0.8);
    color: #fff;
}

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br/><h3>some content</h3>
<br>
<div id="footer">
  <p>I'm the Sticky Footer. inside application.hbs</p>    
</div>

twiddle.json

{
  "version": "0.10.5",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.8.0",
    "ember-data": "2.8.0",
    "ember-template-compiler": "2.8.0",
    "ember-testing": "2.8.0"
  },
  "addons": {}
}