title: Cross-platform WebViews
body: <p>I want to contribute to the FLTK project by offering an <code>Fl_WebView</code>. For that matter, I am looking for the WebView classes on Mac, Windows and Linux.</p>
  
  <p>For OS X, I know that it is <code>NSWebView</code>. But what are the others, how similar are they?</p>