Particle systems outside of Second Life

When playing secondlife.com, I got addicted to particle systems:

http://wiki.secondlife.com/wiki/LlParticleSystem

because they can so realistically model fire, water, clouds, etc.

But logging into Second Life just to create a particle system is
inefficient/laggy (+ there's always someone there who wants to chat,
sheesh!).

What's a good, free, open source particle system generator/displayer
for Linux?

I was half-tempted to use Perl script and povray to "roll my own", but
there has to be a better solution?

-- 
We're just a Bunch Of Regular Guys, a collective group that's trying
to understand and assimilate technology. We feel that resistance to
new ideas and technology is unwise and ultimately futile.
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