This document presents the results of a literature review on approaches to reducing crime and improving neighborhoods that were intended to produce community-level impacts, involved multiple approaches, and were carried out by cross-agency partnerships. The review included efforts focused solely on reducing or preventing crime as well as efforts with broader goals concerning improving neighborhood or resident well-being. The first section covers programmatic elements of initiatives: the strategies, interventions, and activities that successful efforts have employed. The second section covers process and structural elements, with subsections devoted to interagency collaboration, community engagement, and sustainability.