NatureServe Vista® is an extension to ArcGIS that supports complex assessment and planning in any environment, anywhere that has data sufficient for users' planning needs. The tool helps managers and planners assess impacts on a variety of natural, cultural, and development objectives, and create options for sites, and entire landscapes and seascapes.
http://www.natureserve.org/conservation-tools/natureserve...
Organization/Source: NatureServe
Related guides: Prioritization of Conservation Resources