What C++ code should I study?
<p>Here: <a href="http://programmer.97things.oreilly.com/wiki/index.php/Beauty_Is_in_Simplicity" rel="nofollow">http://programmer.97things.oreilly.com/wiki/index.php/Beauty_Is_in_Simplicity</a>
it is written:</p>

<blockquote>
  <p>Think about source code that you have studied. If you haven't spent
  time studying other people's code, stop reading this right now and
  find some open source code to study. Seriously! I mean it! Go search
  the web for some code in your language of choice, written by some
  well-known, acknowledged expert.  </p>
  
  <p>You're back? Good.</p>
</blockquote>

<p>What good quality open source C++ code should I study to learn from?</p>
