generic visualization tool (Gantt chart and more)

 Paje is a graphical tool that displays traces produced during the
 execution of multithreaded programs. Other programs can also generate
 traces for this tool.
 .
 Key Features
   * Supports multi threaded programs
      o each thread of the analysed program can be individually displayed,
        or multiple threads can be combined, to reduce screen space usage.
   * Interactivity
      o each entity represented on the screen can be interrogated for
        more information,
      o related entities are highlighted as mouse cursor passes over
        some representation