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Most of the engineers and designers will have to work with CAD at some point of time to design objects in a better and realistic way. There are many types of CAD software that they could use like 2D CAD Software and 3D drawing software. These free 3D software downloads are free to use and can be used for many purposes. The tools will be advanced enough to render any object in a realistic way.

Free CAD

This freeware can be used to design many real-life objects in any size that you want. The parametric modeling will allow engineers to modify the designs that were drawn and change its parameters.

KOMPAS-3D Home

This premium software that was created by ASCON can be used as a comprehensive MCAD program that will have a powerful set of functions for creating 2D and 3D designs in perfect parameters.

Tinker CAD

This free software by Autodesk, Inc. can be used as a browser based 3D designing and modeling tools that will be suitable for 3D printing purposes. You can imagine anything and draw it quickly.

SketchUp

This premium software created by Trimble Inc has an intuitive and powerful interface that can be used to scale 3D models. The features can be used for page layout and innovative designs can be created.

NaroCAD

This freeware from NaroCAD is a 3D parametric modeling software used for designing solids. The functionalities used here are related to Model Associativity.

GrabCAD

This free software created by STRATASYS will help in simplifying the 3D printing workflow so that you will be able to print faster. It is an easy way to share and manage CAD files.

Sculptris

SOLVESPACE

Solidworks Professional

Vari CAD

Auto Desk 123D

KiCad

NanoCAD Pro 7

Other Free 3D CAD Software for Different Platforms

The different file transfer software that are available online can be used only on some operating system. Once it is designed to work on a particular operating system like Windows, Linux or Mac it will not function on other OS. These software are available online.

AR-CAD for Windows

This free software created by AR-CAD LLC is compatible on the Windows platform and has motion simulation capabilities with which engineers will be able to perform motion and dynamic simulation and 3D CAD development.

Open SCAD for Mac

This freeware is compatible with the Mac platform and can be used to create solid 3D models. It focuses on CAD aspects to create 3D models of machine parts with a 3D compiler.

om3DCAD 3D Modeler for Android

This free Android app was manufactured by Goran Lukic and can be used as a 3D CAD application and 3D CAD conversion tool. It will be able to support different formats like STEP, STL, OBJ and much more.

Auto CAD – Most Popular Software

This premium software from Autodesk Inc. is very popular and can be used for creating 2D and 3D designs in any form imaginable. It can be used on different platforms and has many advanced tools.

How to Install 3D CAD software?

The different 3D CAD software that are available online can be installed as a free version or as a premium version. For the premium versions, the login credentials should be bought from the manufacturer which should be used at the time of login. The file can be downloaded from the website and it should be unzipped. The system requirements should be checked using the readme text to make sure that the software will run on the system and then the software can be installed using the instructions that are prompted. The required language should be set before opening the software.

You will be able to share the drawings and designs that you make on this software and work across different platforms and devices. It will use simplified tools to make a complicated drawing which can be edited later. Dimensioning of the designs will be very easy and the design can be saved as a PDF.

Open Source 2D-CAD

LibreCAD is a free Open Source CAD application for Windows, Apple and Linux. Support and documentation are free from our large, dedicated community of users, contributors and developers.

You, too, can also get involved!

How it started

LibreCAD started as a project to build CAM capabilities into the community version of QCad for use with a Mechmate CNC router.

Since QCad CE was built around the outdated Qt3 library, it had to be ported to Qt4 before additional enhancements. This gave rise to CADuntu.

Cad For Mac

The project was known as CADuntu only for a couple of months before the community decided that the name was inappropriate. After some discussion within the community and research on existing names, CADuntu was renamed to LibreCAD.

Porting the rendering engine to Qt4 proved to be a large task, so LibreCAD initially still depended on the Qt3 support library. The Qt4 porting was completed eventually during the development of 2.0.0 series, thanks to our master developer Rallaz, and LibreCAD has become Qt3 free except in the 1.0.0 series.

Meanwhile, for LibreCAD 2.2.0 series, Qt5 is mandatory.

LibreCAD is a feature-packed and mature 2D-CAD application with some really great advantages:

Completely and Utterly Free

No worries about trials, subscriptions, license costs or annual fees.

Open Source and GPLv2

Developed by an experienced team and supported by an awesome community, LibreCAD is also free to hack and copy.

No Language Barriers

It's available in over 30 languages with cross-platform support for macOS, Windows, and Linux.

Cad Programs Free Online

macOS

from SourceForge
Find latest stable DMG packages there.

from GitHub
Find latest stable DMG packages there.

Windows

from SourceForge
Find latest stable EXE installer there.
Also automated nightly build installer for bleeding-edge versions.

from GitHub
Find latest stable EXE installer there.
Also special prerelease installer for beta testing versions.

Linux

Check your distributions preferred package manager, if LibreCAD is available there. But the version may be a bit older.
For Debian/Ubuntu distributions, you can use our Launchpad PPAs for stable or daily versions.

Build from source

This is an option for all platforms.

If we don't have the binary installer you are looking for, you can try to build LibreCAD from source code.
How this works for each platform can be read in our Wiki .

Source code could be downloaded from GitHub as ZIP archive.

Or you can clone or fork our repository, which is recommended if you plan to contribute.

The LibreCAD team is a small group of dedicated people. Lots of things have been worked out, but plenty of bugs and features are still waiting to be solved. How can you help? We need all the skills in the community as coders, writers, testers or translators.

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An open source community is a dynamic thing; people come and go as their private situation drives or stops them contributing. So, it will always help if you have existing resources we can use, know what other projects do in specific areas, or, most importantly, do what you do best and have fun doing it!
You don't have to sign a lifetime contract to contribute. Whether you can help others in the forum, garden the wiki, or apply one or many patches, our broad user base will appreciate your work.

Come join our community, and contribute in any way you like.

Developing

If you are an outstanding developer in C++ or a beginner we can use your help.
With a bit of determination, the IRC channel, Zulip chat and the Libre-CAD-dev mailing list, we can help you get started and make progress.
All you need is linked in download section and top links above.

Documentation

Developers usually make bad documentation for users, so if you like making documentation, great!
There have been extensive GUI changes in 2.1 series which need to be documented.

Translation

Help localize LibreCAD, we currently support over 30 languages.
Our translation server is over here: https://translate.librecad.org/ .
You can complete new languages, or request creating translations for a new language in the forum .

As a non-profit, community driven open source project LibreCAD is dependent on having good relationships with friends and sponsors.

Friends

BRL-CAD

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BRL-CAD is a powerful open source cross-platform solid modelling system that includes interactive geometry editing, high-performance ray-tracing for rendering and geometric analysis, a system performance analysis benchmark suite, geometry libraries for application developers, and more than 30 years of active development.

BRL-CAD and LibreCAD collaborate in Google programs. We participate under the umbrella of BRL-CAD in Google Code-in and Google Summer of Code where we mentor school pupils and students in participating in open source projects.

Sponsors

JetBrains

JetBrains has generously supplied us with CLion licenses for the development of LibreCAD. This powerful IDE helps you develop in C and C++ on Linux, OS X and Windows, enhancing your productivity with a smart editor, code quality assurance, automated refactoring, and deep integration with CMake build system.