title: Android SDK Manager Extras
body: <p>The Android SDK is shipped with tools:</p>
  
  <ul>
  <li>Android SDK Tools (v22.0.1)</li>
  <li>Android SDK Platform-tools (v17)</li>
  <li>Android SDK Build-tools (v17)</li>
  </ul>
  
  <p>and extras:</p>
  
  <ul>
  <li>Android Support Repository (v1)</li>
  <li>Android Support Library (v13)</li>
  <li>Google AdMob Ads SDK (v11)</li>
  <li>Google Analytics App Tracing SDK (v3)</li>
  <li>Google Analytics SDK (v2)</li>
  <li>Google Cloud Messaging for Android Library (v3)</li>
  <li>Google Play Services (v7)</li>
  <li>Google Repository (v1)</li>
  <li>Google Play APK Expansion Library (v3)</li>
  <li>Google Play Billing Library (v4)</li>
  <li>Google Play Licensing Library (v2)</li>
  <li>Google USB Driver (v7)</li>
  <li>Google Web Driver (v2)</li>
  <li>Intel x86 Emulator Accelerator (HAXM) (v3)</li>
  </ul>
  
  <p>Some of them are documented on <a href="http://developer.android.com" rel="noreferrer">developer.android.com</a> and other websites. However, I didn't find anything related to the following:</p>
  
  <ul>
  <li>Android Support Repository (v1)</li>
  <li>Google Analytics App Tracing SDK (v3)</li>
  <li>Google Repository (v1)</li>
  </ul>
  
  <p>What are they?</p>