Grids Lite is now available for free in the Unity Asset Store (previously $20). Download it now.
Grids Lite allows you to rapidly prototype and develop your games using Rect, Diamond and certain Polar grids. It contains many algorithms, including A* path-finding, range-finding and connection algorithms (used in match games).
Find out more about Grids and compare features with Grids Basic and Grids Pro.
Edit: This offer has expired.