ArcGIS Editor for OpenStreetMap (download) Contribute to the OpenStreetMap project using the ArcGIS editing environment.
Districting for ArcGIS (download) Redraw political boundaries, define districts, set up territories, and analyze results.
Esri S-57 Viewer (download) Visualize S-57 data in compliance with S-52 standards and specifications.
Free Geoportal Add-ons (download) Catalog geospatial resources within an enterprise regardless of location or type.