Uses of Interface
squidpony.squidgrid.zone.Zone

Packages that use Zone 
Package Description
squidpony.squidgrid.mapping
Tools specifically for generating maps and placing content in them, usually working with 2D char arrays.
squidpony.squidgrid.zone
Ways to represent different types of areas in 2D space; not recommended, most new code uses GreasedRegion.
squidpony.squidmath
A very broad package containing random number generators, geometry tools, data structures, and noise functions.