Maddie’s Fund is behind some of the most successful and widely known shelters in North America primarily because they are dedicated to making shelters no-kill and doing it well. This organization offers grants for pet/shelter/rescue related projects to help groups become and support efforts to remain no-kill. See No Kill Nation.
I was particularly interested in the editorials provided by the website on the community support for a no-kill sheltering. See this article on Making the Community No-kill.