in reply to Discrete event simulation

Skimming the Simpy overview, its core looks a lot like POE to me. Together with a GUI Toolkit like Tk, GtK or Qt such a system could easily be built in perl, just connecting the dots.

--shmem 

_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}

In Section Seekers of Perl Wisdom