DoubleCAD XT may expose a COM interface. You could control it from:
Check in the application's menu: Tools → Customize → COM Interface.
To understand the value of DoubleCAD XT 6, you must compare it to alternatives in the same price bracket (Free) and the low-cost commercial bracket.
| Feature | DoubleCAD XT 6 | AutoCAD LT (Paid) | DraftSight (Free Tier) | LibreCAD |
| :--- | :--- | :--- | :--- | :--- |
| Price | Free | ~$500/year | Freemium (Limited) | Free |
| Native .DWG | Yes (v2018) | Yes | Yes | No (DXF only) |
| 3D Modeling | Yes (ACIS) | No | No (2D only) | No |
| Command Line | Yes | Yes | Yes | Yes |
| Raster to Vector | Yes | No | No | No |
| Learning Curve | Moderate | Steep | Moderate | Moderate |
Verdict: DoubleCAD XT 6 is the only free tool on the market that offers native DWG and solid 3D modeling.
DoubleCAD XT 6 is a free, professional-grade CAD software designed for architectural drafting, mechanical design, and general illustration. Unlike "viewers" or stripped-down free tools, DoubleCAD XT 6 is a fully functional application. It was originally developed as a direct competitor to AutoCAD LT, offering similar 2D drafting tools plus robust 3D modeling capabilities that AutoCAD LT lacked.
The "XT" stands for "Extended Technology." Version 6 represented a major leap forward, introducing better GPU acceleration, improved 3D ACIS® modeling, and a highly customizable user interface.
If you need advanced API access (e.g., .NET, C++), consider upgrading to a more extensible platform like BricsCAD, nanoCAD, or AutoCAD LT with LISP.
Compatibility is the kingmaker in CAD. DoubleCAD XT 6 reads and writes AutoCAD .dwg files natively. It supports file versions up to AutoCAD 2018. This means you can open legacy files from clients, edit them, and save them back without losing layer structure, blocks, or line weights.
One of the trademark features of DoubleCAD is the "Dual Mode" display. You can split your screen to show a 2D top-down view on the left and a live 3D rendered view on the right. As you draw lines in 2D, the 3D model updates instantly. This is invaluable for users creating extrusions or complex profiles.
Unlike strictly 2D tools, DoubleCAD XT 6 allows you to draw in 2D and then extrude, sweep, or loft those profiles into 3D solids. It utilizes the ACIS® modeling kernel (the same engine found in high-end software like SolidWorks and AutoCAD), ensuring precise geometry for boolean operations (union, subtract, intersect).
Doublecad Xt 6 -
DoubleCAD XT may expose a COM interface. You could control it from:
Check in the application's menu: Tools → Customize → COM Interface.
To understand the value of DoubleCAD XT 6, you must compare it to alternatives in the same price bracket (Free) and the low-cost commercial bracket. doublecad xt 6
| Feature | DoubleCAD XT 6 | AutoCAD LT (Paid) | DraftSight (Free Tier) | LibreCAD |
| :--- | :--- | :--- | :--- | :--- |
| Price | Free | ~$500/year | Freemium (Limited) | Free |
| Native .DWG | Yes (v2018) | Yes | Yes | No (DXF only) |
| 3D Modeling | Yes (ACIS) | No | No (2D only) | No |
| Command Line | Yes | Yes | Yes | Yes |
| Raster to Vector | Yes | No | No | No |
| Learning Curve | Moderate | Steep | Moderate | Moderate |
Verdict: DoubleCAD XT 6 is the only free tool on the market that offers native DWG and solid 3D modeling. DoubleCAD XT may expose a COM interface
DoubleCAD XT 6 is a free, professional-grade CAD software designed for architectural drafting, mechanical design, and general illustration. Unlike "viewers" or stripped-down free tools, DoubleCAD XT 6 is a fully functional application. It was originally developed as a direct competitor to AutoCAD LT, offering similar 2D drafting tools plus robust 3D modeling capabilities that AutoCAD LT lacked.
The "XT" stands for "Extended Technology." Version 6 represented a major leap forward, introducing better GPU acceleration, improved 3D ACIS® modeling, and a highly customizable user interface. Check in the application's menu: Tools → Customize
If you need advanced API access (e.g., .NET, C++), consider upgrading to a more extensible platform like BricsCAD, nanoCAD, or AutoCAD LT with LISP.
Compatibility is the kingmaker in CAD. DoubleCAD XT 6 reads and writes AutoCAD .dwg files natively. It supports file versions up to AutoCAD 2018. This means you can open legacy files from clients, edit them, and save them back without losing layer structure, blocks, or line weights.
One of the trademark features of DoubleCAD is the "Dual Mode" display. You can split your screen to show a 2D top-down view on the left and a live 3D rendered view on the right. As you draw lines in 2D, the 3D model updates instantly. This is invaluable for users creating extrusions or complex profiles.
Unlike strictly 2D tools, DoubleCAD XT 6 allows you to draw in 2D and then extrude, sweep, or loft those profiles into 3D solids. It utilizes the ACIS® modeling kernel (the same engine found in high-end software like SolidWorks and AutoCAD), ensuring precise geometry for boolean operations (union, subtract, intersect).