Developer saqsun has released his new Phaser Particle Editor and plugin. The Particle Editor allows you to visually create an emitter. Setting properties, loading images and creating the right effect you want. It then exports JSON data. The second part is a Phaser Plugin that loads the JSON files and creates emitters from them in your games.
There's a GitHub repo for the plugin, the editor is hosted online and you can follow developments in this forum thread too.