title: What effects libraries are available for GWT for commercial use?
body: <p>I'm looking for an effects library that I can drop in to my existing GWT app really, really easily.  I want to add the library to my build path and then start writing things like <code>FX.fadeOut(thisWidget)</code> to replace <code>thisWidget.setVisible(false)</code>.</p>
  
  <p>Is there anything solid and small available for GWT that can do this kind of simple thing?  I'm writing an app for commercial use that will not be open source.</p>