Opulus is a free Petri Net simulator useful to learn about place/transition Petri Net's.

Want help us?

If Opulus is not translated to your language, translate it yourself! Is a 10 minutes job and you don't need programming skills, contact us and we will tell you how to achieve it.


  • Intuitive and easy to use/easy to learn™.
  • Edit place/transitions Petri Nets.
  • Simulate place/transitions Petri Nets.
  • Export to SVG, PNG and PS.
  • Generate the Petri Net coverage graph.
  • Support inhibitor arcs.
  • GPL'ed :-)
  • Multiplataform (Unix, windows, teorically you can compile it on MacOSX, but we do not have a Apple computer to test it).
  • Internationalizable.