I was always planning on doing a Particle tutorial, but never had the time to write one. I do however have the Capx full of examples.
Snow, leaves, rain, fire, explosions, smoke trails, star fields, fireworks, glitter, fountains, candle flames, and more,
I'll clean it up and upload it.
edit: https://www.scirra.com/tutorials/761/particle-demo-capx