StackIt is an After Effects script that allows you to stack layers into any sized grids, staggered grids, rows, and columns using selected layers. It'll also duplicate as needed to fill if you want it to. Combined with Cascade, you can make some pretty dope animations because Cascade simplifies layer sequencing across three practical modes: ascending/descending, random, and radial. Whether you need to uniformly space layers, introduce random variations, or create radial animations centered around a specific point, Cascade provides the tools to enhance your workflow efficiently.
These scripts are designed to help you focus more on creativity by reducing the manual effort of laying things out and adjusting their timing.
For more information check out the individual product pages—StackIt + Cascade.
This download comes with both scripts. StackIt comes with a user guide and Cascade's manual is online here.