FreeCAD
FreeCAD is an open-source parametric 3D modeler made primarily to design real-life objects of any size. Parametric modeling allows you to easily modify your design by going back into your model history and changing its parameters. FreeCAD allows you to sketch geometry constrained 2D shapes and use them as a base to build other objects. It contains many components to adjust dimensions or extract design details from 3D models to create high quality production ready drawings. FreeCAD is a multiplatfom (Windows, Mac and Linux), highly customizable and extensible software. It reads and writes to many open file formats such as STEP, IGES, STL, SVG, DXF, OBJ, IFC, DAE and many others, making it possible to seamlessly integrate it into your workflow. FreeCAD is designed to fit a wide range of uses including product design, mechanical engineering and architecture. Whether you are a hobbyist, a programmer, an experienced CAD user, a student or a teacher, you will feel right at home with FreeCAD.
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Apowersoft CAD Viewer
An easy-to-use, yet full-featured CAD software that can view, annotate, measure, edit and convert your drawings quickly. Anyone can open and view all versions of AutoCAD drawings completely and accurately, and even edit and model their designs quickly and easily due to its exclusive analytical technique. No matter if it's a higher or lower DWG file, this CAD software allows you to open it without such problems as unclear fonts, wrong mild steel types, inexplicable Latin character garbled, etc. It also has a useful toolkit to modify and re-model the designs.You can annotate your drawings with text, linear, ellipse, rectangle, etc. In addition, add annotative dimensions to the objects in your draft without damaging the quality including linear, radial, angular, ordinate, arc length, etc. Measure the distance, angle, radius, area, volume, arc length, coordinate, and even edit the drawings as you go.
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Glovius CAD Viewer
Simple and easy-to-use CAD Viewers with powerful tools for visualization, analysis, collaboration, reporting, and exporting CAD files. Take measurements, cut sections, compare revisions, analyze CAD parts and assemblies, create reports for collaboration, and export to STEP, 3DPDF, STL, and many more formats. Glovius comes with a free 2D viewer to view DWG, DXF, and CATDrawing files. View CAD files in your browser. No installation required. Upload and view popular CAD parts, assemblies, and drawing files. Link your Dropbox for automatic syncing. View 3D Geometry, Product Structure, PMI and GDnT, and Attributes information. Cut dynamic sections, take measurements, save Bill of Materials, and view essential component information. Share 3D files with a link, and embed models in websites. Glovius for iOS provides a simple and easy way to view, showcase, and collaborate on 3D CAD parts and assemblies from your iPhone and iPad, and view 3D parts and assemblies from popular CAD formats.
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ABViewer
ABViewer is universal software for PC for working with drawings. It enables you to view, edit, convert, measure and print DWG and other CAD files, as well as 3D models and raster images. You can work with a separate fragment of a drawing or, on the contrary, with a group of files. All this at an attractive price! ABViewer allows converting single files or a group of files. Batch conversion provides a wide range of export settings, for example, black-and-white mode, specifying the output file size, etc. The 3D section panel has controls for setting up visual display of 3D models and section planes. The panel is available in the 3D Viewer mode. The commands and options of the 3D Section panel enable to customize 3D model viewing. To display parts of a model, section and gizmo use the settings located at the top of the form. It is possible to create several planes at the same time.
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