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
   - each thread of the analysed program can be individually displayed,
     or multiple threads can be combined, to reduce screen space usage.
 * Interactivity
   - each entity represented on the screen can be interrogated for
     more information,
   - related entities are highlighted as mouse cursor passes over
     some representation

WWW: http://www-id.imag.fr/Logiciels/paje/