title: Library that can generate both PDF and Excel
body: <p>I'm looking for a library that can generate <strong><em>both</em></strong> PDF and Excel files (which will be returned on-the-fly by a web service). </p>
  
  <p>It's going to be used for reporting.</p>
  
  <p>(please don't suggest that I should use OLE automation since it's pretty worthless in a server environment)</p>