Adds an ecosystem section

source/learn.html.erb

@@ -17,6 +17,24 @@ responsive: true
     Whether you're just getting started and want to get familiar with the Ember ecosystem, or you're looking to refresh your knowledge on a certain feature, <a href="https://guides.emberjs.com/">the Guides</a> are the place for you.
   </p>
 
+  <h1>Ecosystem</h1>
+
+  <p>
+    Ember's ecosystem of libraries solve the hard problems around building, client to server communication and server side rendering.
+  </p>
+
+  <p>
+    You build your application using Ember CLI. If you're just getting started with Ember, or are unfamiliar with Ember CLI, head over to <a href="https://ember-cli.com/user-guide/">the Ember CLI User Guides</a>. The default build process might not suit you perfectly, so you need to <a href="https://ember-cli.com/extending/">extend Ember CLI itself</a>.
+  </p>
+
+  <p>
+    While it's not a requirement, Ember includes a complimentary library for client to server communication called <a href="http://emberjs.com/api/data/">Ember Data</a>.
+  </p>
+
+  <p>
+    If you want your application to be rendered on the server, <a href="http://ember-fastboot.com/">FastBoot</a> is the solution for your Ember application.
+  </p>
+
   <h1>API Reference</h1>
 
   <p>