Here’s a little project I’ve been meaning to get to for a while. A general purpose particle system for AS3.
http://rogue-development.com/pulseParticle.xml
It’s not done yet, but you can read about it, see some examples, and download the source on the project page.

XSLT processing failed!
Odd, the xslt based pages work on every browser I tried.
The example…
http://rogue-development.com/pulse/Flinger.swf
The code…
http://code.google.com/p/pulse-particle/downloads/list
Also a note, the example looks a bit choppy to me today on a slower machine than the monster I usually develop on. There’s some code in the engine to step particles slower or faster depending on the current performance, I guess that’s not right yet. Still a work-in-progress!
-Marc
Blogger chopped off the URL’s depending where you view it from
The example…
The code…