how to create particle effect like this>help me

how to create particle effect like this.that show in that image>help me to do that.please suggest me some tutorials or share some demo projects to learn about this techniques !
thanks in advance
note:Sample image of the particle effect is attached with this post below

1103494--41479--$CFX_SmokePuffsAlt+Text.JPG

Not Able to see your attached Image

check now

nope… its not there for me either…

check out this website for reference .i dont have any guessing how they done particle effect like that.pls help me to do that
http://portfolio.jumpnslide.net/cartoonfx/

try these examples once http://beta.unity3d.com/3.5-preview/ShurikenExamples.zip .
effects are created by using sprites with random rotation .