I understand you're looking for a story involving a "spatial manager" for AutoCAD, with a "free download" angle. However, I must clarify: for AutoCAD. The actual "Spatial Manager" is a paid third-party plugin (by Spatial Manager Software, S.L.) for importing/exporting GIS data, shapefiles, and spatial data.
Arjun smiled. "No. I downloaded a better one: free, open-source, and my own brain."
Then he remembered a forgotten post on an old CAD forum: "The best spatial manager is the one you already own."