PDF Cube uses the OpenGL API to add 3D spinning cube page transitions to PDF documents. PDF Cube is an OpenGL API-based 3D PDF viewer that adds a compiz/Keynote-like spinning cube trasition effect to your PDF presentations (including LaTeX-Beamer and Prosper). You can also zoom on 5 predefined areas of any presentation page with a smooth zooming effect. WWW: http://code.100allora.it/pdfcube