Requirements
Python 3.x and the
pywin32 library are required. Install with: pip install pywin32. AutoCAD or Civil 3D must be open when running scripts that connect to a live drawing.
PopularFree
Civil 3D Plugin
OpenHere
Fixes an AutoCAD annoyance: the Open dialog now starts in your current drawing's folder, instead of wherever it last remembered.
BetaFree
Drawing Analysis
DWG Comparison Tool
Overlays two open drawings and highlights geometric differences by layer. Exports a marked-up PDF showing exactly what changed between revisions. Still early — may need refining on some drawings.
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