title: A tool to visualize network connections
body: <p>Currently I'm planning on using dot and it's family.</p>
  
  <p>I want to know if there is something more appropriate?</p>
  
  <p>I'll need to show several levels, card and network connection(input and output):</p>
  
  <pre><code>----------
  |IOIOIOIO|
  --|-------
    \\
  ---|------
  |IOIOIOIO|
  ----------
  </code></pre>