Have you ever thought, "Wow, particle emitters are great, but planes are sooo 2D. I wish I could spray an unreasonable number of 3D objects into my scene instead" ?
Well, I have great news - now you can!
This script gives you almost all the same controls as a regular 2D emitter - things like birthrate, speed, and gravity - as well as a simple physics simulation for objects colliding with the ground of your scene. It also exposes an API for use in other scripts. You can check out the github repo for more information about all the controls available including the available API properties.
A slightly customized version of the script in action can be seen here
I'll update this post if I end up making a Youtube tutorial walking through how to implement the script in your projects, but for now, feel free to ask any questions you might have in the comments. Enjoy!