Most Instructive Open Source Android Projects?
<p>I'm looking to compile a list of instructive open-source Android projects.</p>

<p>My criteria for instructiveness:</p>

<ul>
<li>High code quality</li>
<li>Good API coverage, demonstrating how various parts of the API interact</li>
<li>Continually improved, showing that the designs are in fact maintainable</li>
<li>Good aesthetic quality</li>
</ul>

<p>In other words, the apps that as <em>intermediate to advanced</em> Android developers we should be looking to for guidance, and not simply tutorials that demo a few concepts.</p>
