<p>The way this question is phrased, it's Not Constructive by the vast majority of the Stack Exchange sites.  </p>

<p>From <a href="http://blog.stackoverflow.com/2010/11/qa-is-hard-lets-go-shopping/">"Q&amp;A is Hard, Let's Go Shopping"</a>:</p>

<blockquote>
  <p>The former question provides the path of least resistance: a laundry
  list of products I can buy without thinking about it too much. But
  that answer will only be valid for a year at best. The latter question
  may take some thinking, but its answer will be valid forever</p>
</blockquote>

<p>The way this question is phrased, it is an example of the former question in the quote above, which is of the form:</p>

<blockquote>
  <p>What are/where can I find/what is the best/etc items of type &lt;X&gt;</p>
</blockquote>

<p>These are problematic for a number of reasons:</p>

<ul>
<li>The voting mechanism doesn't work well for these items.  Since the initial question is overly broad, the upvotes are being used to compare apples to oranges.</li>
<li>It tends to attract a number of links to sources (with little accompanying them), <a href="https://meta.stackexchange.com/a/8259/140951">which are not real answers</a>; link-rot is a <em>huge</em> concern here.</li>
<li>People don't maintain the lists properly.</li>
</ul>

<p>That said, it's been suggested on <a href="http://meta.stackoverflow.com">Meta Stack Overflow</a> (the town hall for all of the Stack Exchange sites) many times that lists should be maintained somewhere else.</p>

<p>That doesn't mean list questions can't live here, but it's <em>strongly</em> encouraged that Stack Exchange sites have <em>very</em> strict guidelines around them so as to not have your site filled with reference lists instead of real questions and answers (remember, Stack Exchange sites are question and answer sites).  We want other sites in Stack Exchange to benefit from the experiences that sites preceding them have experienced.</p>
