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FreeCAD is a free and open-source application that can work with the DWG files by using the proprietary ODA File Converter for .dwg and .dxf files from the Open Design Alliance (ODA). [55] The ODA also provides a freeware stand-alone viewer for .dwg and .dgn files, ODA Drawings Explorer, which runs on Windows, Linux, and Mac OS X.
LibreCAD is a computer-aided design (CAD) application for 2D design. It is free and open-source, and available for Unix/Linux, macOS, and Windows operating systems.. Most of the interface and handle concepts are analogous to AutoCAD, making it easier to use for users with experience in this type of commercial CAD application.
FreeCAD's own main file format is FreeCAD Standard file format (.FCStd). [9] It is a standard zip file that holds files in a certain structure. [ 9 ] The Document. xml file has all geometric and parametric objects definitions. [ 9 ]
GNU LibreDWG is a software library programmed in C to manage DWG computer files, native proprietary format of computer-aided design software AutoCAD. It aims to be a free software replacement for the OpenDWG libraries. The project is managed by the Free Software Foundation (FSF).
Drawings SDK is a development toolkit that provides access to all data in .dwg and .dgn through an object-oriented API, allows creating and editing any type of .dwg or .dgn drawing file, and can be extended with custom .dwg objects. (Old names: Teigha Drawings, Teigha for .dwg files and Teigha for .dgn files; OpenDWG and DWGdirect; DGNdirect.)
ZWCAD is compatible with widely used 2D CAD drawing formats (such as DWG, [6] DWT, DXF, DWF) and can directly read and save common graphics information. In addition, ZWCAD's interface and usage are similar to those of other 2D CAD software.
Poison Profits. A HuffPost / WNYC investigation into lead contamination in New York City
IntelliCAD can also natively open and edit MicroStation DGN files by Bentley Systems. Included in IntelliCAD functionality: [8] [9] [10] Read and write binary .dwg and DGN files. Work with BIM files and data, and AEC entities. Familiar command line and user interface for creating and editing CAD drawings.