Users interested in Fragstats 3.3 generally download:
Work with geospatial data, analyze spatial patterns, calculate and categorize landscape metrics. The tool computes patch-based, cell-based, and surface metrics. Provides several options for sampling the landscape to analyze sub-landscapes. Supports multiple raster images, including ASCII grid, 8-, 16- and 32-bit integer grids, ESRI grid, GeoTIFF grid, etc.