Ruler for Foundation is a free utility designed for players of the game Foundation on Windows. This program offers a set of rulers to measure distances within the game environment, enhancing the building experience. It includes a fixed point-to-point ruler and various colored freeform rulers, each identifiable by unique particle effects. Players must ensure each color is used only once on the map for optimal performance of the particle effects.

Installation is straightforward with a manual setup process that requires users to download a zip file and place it in a specific directory. The program aims to improve gameplay by providing precise measurement tools, which can be particularly beneficial during construction projects in Foundation. However, it is important to note that the freeform rulers have been removed in the release version due to modding limitations.