title: Rails PDF generating alternative to Prawn
body: <p>I've been using Prawn to generate simple invoice PDFs. I now have the need to create a more complicated PDF document and <a href="https://stackoverflow.com/questions/4210251/ruby-prawn-pdf-out-of-memory-when-using-the-group-method">Prawn is coming up short</a>. I need to copy an existing layout precisely so converting from HTML (a la Princely) is not an option.</p>
  
  <p>Can anyone recommend a good alternative, or any alternative for that matter?</p>