SpatialKit

This is an add on for ArcGIS that allows direct access to PostgreSQL PostGIS data

(There is also a SQL Server version)

Requirements

• ArcGIS 10
• PostGIS 1.5
• PostgreSQL 8 or 9 (I am testing with 9)
• .Net Framework 3.5

(There is also an old version for 9.3 + PostGIS 1.0.1, meh.)

Commentary

http://www.inigis.org/402/pgmap-arcgis-extension-for-connecting-to-postgis-without-arcsde.html/

Download site http://st-links.com/Download.aspx