title: Resizing a window to a set size in Linux
body: <p>Anyone knows a good way to resize any window to for example 640x480?</p>
  
  <p>Reason is, of course, screencasting.</p>
  
  <p>Under windows I've used ZoneSize from donationcoder. (Btw: For Firefox it's easy, just use the web developer toolbar.)</p>