title: HTML5 based node-graph editor?
body: <p>I'm looking for an in browser click-n-drag type editor for editing directed labeled graphs.</p>
  
  <p>All I need is a widget to support the editing and the ability to submit (AJAX, form, whatever) the resulting set of origin/label/terminus tuples. It's not what I need it for, but a GUI editor for <a href="http://www.graphviz.org/Gallery/directed/fsm.html">simple GraphViz cases</a> would be nearly ideal. This <a href="http://old.umlcanvas.org/About">UML widget</a> is kinds along the right track.</p>
  
  <p>And I'm kind of restricted to open source, freeware and public domain.</p>
  
  <p>Some other close, but not quite options:</p>
  
  <ul>
  <li><a href="http://arborjs.org/">arbor.js</a> (view, not edit. And I don't need the auto layout.)</li>
  <li><a href="http://dhotson.github.com/springy/demo.html">springy</a> (ditto.)</li>
  </ul>