FreeCAD. FreeCAD is a general-purpose parametric 3D computer-aided design (CAD) modeler and a building information modeling (BIM) software application with finite element method (FEM) support. It is intended for mechanical engineering product design but also expands to a wider range of uses around engineering, such as architecture or electrical engineering. FreeCAD is free and open-source, under the LGPL-2.0-or-later license, and available for Linux, macOS, and Windows operating systems. Users can extend the functionality of the software using the Python programming language.

Features

General
FreeCAD features tools similar to CATIA, Creo, SolidWorks, Solid Edge, NX, Inventor, Revit, and therefore also falls into the category of building information modeling (BIM), mechanical computer-aided design (MCAD), PLM, CAx and CAE. It is intended to be a feature-based parametric modeler with a modular software architecture, which makes it easy to provide additional functionality without modifying the core system.

As with many modern 3D CAD modelers, FreeCAD has a 2D component to facilitate 3D-to-2D drawing conversion. Under its current state, direct 2D drawing (like AutoCAD LT) is not the focus for this software, and neither are animation or 3D model manipulation (like Blender, Maya, or Cinema 4D). However, the modular nature of FreeCAD allows the user to adapt its workflow for such environments via the use of plugins.

FreeCAD uses open-source libraries from the field of computing science; among them are Open CASCADE Technology (a CAD kernel), Coin3D (an incarnation of Open Inventor), the Qt GUI framework, and Python, a popular scripting language. FreeCAD itself can also be used as a library by other programs.

There are moves to expand FreeCAD in the architecture, electrical, and construction (AEC) engineering sectors and to add building information modeling (BIM) functionality with the Arch Module.

Supported file formats 
FreeCAD's own main file format is FreeCAD Standard file format (.FCStd). It is a standard zip file that holds files in a certain structure. The Document.xml file has all geometric and parametric objects definitions. GuiDocument.xml then has visual representation details of objects. Other files include brep-files for objects and thumbnail of drawing.

Besides FreeCAD's own file format, files can be exported and imported in DXF, SVG (Scalable Vector Graphics), STEP, IGES, STL (STereoLithography), OBJ (Wavefront), DAE (Collada), SCAD (OpenSCAD), IV (Inventor) and IFC.

DWG support 
FreeCAD's support for the proprietary DWG file format has been problematic due to software license compatibility problems with the GNU LibreDWG library. The GNU LibreDWG library started as a real free alternative to the source-available OpenDWG library (later Teigha Converter and now ODA File Converter) and is licensed under the GPLv3. As FreeCAD (and also LibreCAD) has dependencies on Open Cascade, which prior to version 6.7.0 was only compatible with GPLv2, it couldn't use the GNU LibreDWG library as GPLv2 and GPLv3 are essentially incompatible. Open CASCADE technology was contacted by Debian team in 2009, and 2012 got a reply that Open CASCADE technology was considering dual-licensing OCCT (the library), however they postponed that move. A request also went to the FSF to relicense GNU LibreDWG as GPLv2 or LGPLv3, which was rejected.

As of 2014 the 0.14 release of FreeCAD, including the new LGPL release of Open Cascade, the BSD-licensed version of Coin3D, and the removal of PyQT, FreeCAD is now completely GPL-free. However, LibreDWG has not been adopted. FreeCAD is able to import and export a limited subset of the DWG format via the ODA File Converter (the former OpenDWG library).

Promotions during events 
FreeCAD was notably presented at FISL 16 in 2015, in Porto Alegre, as well as at the Libre Graphics Meeting in London in 2016. These two exhibitions can bring together both developers and users. In 2020, it was during FOSDEM in Brussels that two of these developers, Yorik Van Havre and Brad Collette made the presentation.

FreeCAD 1.0 
The FreeCAD 1.0 version includes several new features, such as the new assembly workbench; fixes for many bugs, including the topological naming problem; unification and correction of many workbenches; very diverse changes and improvements in the user interface and user experience (UI/UX); and a new logo, chosen from five finalists of the public contest created to renew the brand. It was released on November 18, 2024.

New FreeCAD logo 
With the release of FreeCAD 1.0 on the horizon, it was decided to make a logo and branding change. At the request of the project managers, the intent of the update was to iterate on the current branding, rather than completely replace it.

A public call for proposals opened on March 22 until April 14, 2024 and allowed for a single logo proposal to be uploaded. With multiple and varied proposals, the community came together in a surprising and broad way, generating designs and discussions on many social networks including Reddit, Twitter, Facebook, Discord and the discussion forums themselves. By the time the submission period ended, there were already 46 valid options to choose from.

A weighted poll was then conducted that allowed any member of the community to vote for five logos that, in their opinion, best represented the principles, values and representativeness of FreeCAD, or simply worked graphically in the best way. Likewise, there was a massive participation of the community generating opinions and discussions on the relevance or not of the options.

By the time the survey was completed, which was on May 1, 2024, there was a participation of about 1500 people who chose their favorite logos, allowing to choose the final logos that would be sent to the maintainer team for their final decision:

On May 21, 2024, a final decision had already been made and was announced in all the media and social networks available in the following days, and although there was quite a lot of discussion within the team, it was possible to reach a consensus defined by only one vote compared to the second favorite.

In the words of the maintainer team:
FreeCAD has had the same logo for many years, and in recent years the community told the Maintainers team loud and clear that it was time for a change. Thanks to the hard work of Obelisk and a whole cadre of talented designers, a collection of excellent candidates was assembled that kept the spirit of the original logo, but also evolved it, sometimes in unexpectedly delightful ways (the dino-logo holds a special place in my heart). A community vote was conducted to narrow the list to five candidates, and those were presented to the Maintainers team for final decision. That decision was a difficult one: the Maintainers did not achieve a consensus result, and had to simply go with a “majority rules” vote. There were strong opinions about each of the final candidates, and in the end the chosen logo won by a single vote. Thanks to the FreeCAD community for such an outpouring of enthusiasm for the process (over 1500 people voted). There were many great possibilities, and we know that many of your favorites didn’t make the cut. In the end, only one logo could be selected (until next time…). Enjoy!

The winning logo was designed and proposed by Sebastián Tabares (syta.co) in the respective forum and Discord thread, accompanied by a showcase showing the different uses and variations that can be given to the logo, immediately, it got support from many members of the community that from that moment began to give their “touch” to the initiative, including designs for CNC machining, 3D printing, stickers, GIFs, animations, FEM models, merchandise, wallpapers, among many other things.

At the time of writing this section, the community is in the process of changing its brand presence in the different resources where the logo is used, such as forums, social networks, wikis, GitHub repositories, etc, in preparation for the release of FreeCAD 1.0; however, there is already an official guideline for the use of the logo in its short, long and mono version; the recommended and prohibited uses, all available in .

Release history
 GitHub Files section ()

See also

 Comparison of computer-aided design software
 Boundary representation
 Constructive solid geometry
 Open CASCADE Technology
 Parametric modeling
 List of BIM software
 List of 3D printing software

Notes

References

Further reading
 Falck, Daniel; Collette, Brad (2012): FreeCAD [How-to]. Solid Modeling with the Power of Python, Packt Publishing, Birmingham, .
 Hinchliffe, Jo; van Havre, Yorik (2022): FreeCAD for Makers. From The Makers of HackSpace Magazine, Raspberri Pi Press, PDF (CC BY-NC-SA 3.0).

External links

 

2002 software
Computer-aided design software for Linux
Computer-aided design software for Unix
Computer-aided design software for Windows
Engineering software that uses Qt
Free computer-aided design software
Free software programmed in C++
Free software programmed in Python
MacOS computer-aided design software
BIM software
Software using the GNU Lesser General Public License
Software that uses VTK