TopoCal

TopoCal 2010 2014 v5.0.252

Performs calculations on CAD terrain models

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ARKITool

ARKITool

Plugin that adds functionality to AutoCAD and BricsCAD

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Volo View Build 171

Open AutoCAD files without having it installed

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LibreCAD

LibreCAD 2.2.0

A free CAD program for 2D design

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Autodesk Inventor View 2010

View projects completed with Autodesk Inventor

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Autodesk DWG Trueview

Autodesk DWG Trueview 2022

View and convert AutoCAD documents

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DraftSight

DraftSight 2020

One of the best free 2D CAD programs

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BRL-CAD

BRL-CAD 7.14.8

CAD design and modeling software

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A9CAD

A9CAD 2.2.1

CAD tool for 2D visualization and editing

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Pprotopo

Pprotopo 1.0

A plugin for AutoCAD to create topographic maps

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