Particle Lab

With Particle Lab you can experiment with all relevant Parameters of the CAEmitterLayer and the CAEmitterCell class. The editor includes the functionality to nest the cells so you can set a particle system to be a particle of a particle system. If you are finished you can export the particle system to code so you will have an NSView and a UIView class containing the particle Systems parameters that you can use in your Projects. Additionally you can save the Particle System as File to continue work later.