Friends of 1800 - A nonprofit organization dedicated to preserving historic buildings, landmarks and the architectural heritage of San Francisco, with a focus on LGBT-significant sites.
National Trust for Historic Preservation - A nonprofit organization established in 1949 which acquires and preserves historic places and works to revitalize neighborhoods.
Sagadahoc Preservation Incorporated - A nonprofit corporation dedicated to the preservation of Bath, Maine's historic buildings and architectural heritage.
Old House Journal Online - E-zine with focus on old houses, remodeling, renovation, home repair and design, kitchen and bath remodeling, and cost vs. value.
