Here's one that focuses on architectural preservation in one city:
Here's one that has a broader focus -- assisting several cities and communities in a variety of ways:
Here's one in Oregon that focuses on a particular segment of the population:
(needs Adobe Reader)
To find more, just go to www.google.com and enter community foundation "_____" (put a city or area in the blank; include the quotation marks if the city or area has more than one word).