Since it can be time consuming to continuously make modifications to a particle system and view the results until you get it just the way you want it, I've created this app to customize a particle system from scratch using AndEngine's particle initializers and modifiers. Comes with 4 default particle textures and custom textures can be loaded from external storage. There is no way to export code at this time, but it is a possibility for a future update.

-Use the menu button to add/remove particle initializers and modifiers. Multiple particle modifiers may be added of the same type.
-When editing a text box use enter/return to update the particle system with the new values.
-Custom particle textures can be loaded from external storage. Use "Load Textures" from the menu. Any textures with a .png extension found in /particlesystem/textures/ in external storage will be added to the particle textures drop down menu.
-When editing the particle system, if "Particle System Lifetime" is set to 0, the particle system will run continuously without resetting until a new option is set, so an Expire Initializer should be used. Otherwise, the particle system will reset after the specified amount of time in seconds has passed.

Requires access to read/write to external storage for using custom textures.
Requires a GLES 2.0 compatible device.

The default textures used can be found here: http://www.andengine.org/forums/tutorials/particle-effect-sprites-t178.html

Tested on a 2nd generation Kindle Fire and Droid X2