There are some. Check out the code archives (or the german codearchivs where several particle systems can be found)
I'm "currently" rewritting particle dreams as well to teach it some new tricks (timeline especially, spline and linear) and make it easier to use in a real usage environment.
I'm "currently" rewritting particle dreams as well to teach it some new tricks (timeline especially, spline and linear) and make it easier to use in a real usage environment.