1. FreeCAD is a general purpose parametric 3D CAD modeler. The development is completely Open Source (LGPL License).
  2. LibreCAD (originally QCad then CADuntu) is an open source 2D CAD application for Windows, Apple and Linux. It is based on Qt, which is a leading cross-platform application and UI development framework.
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    • Mac
    • Windows
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    AutoCAD is a leading CAD (computer-aided design) software used professionally throughout architectural, electrical, mechanical and other engineering and design industries. It was once available under a perpetual license but is now accessed solely through a subscription.
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  3. KiCad is an open source software suite for electronic design automation (EDA) - designing schematics of electronic circuits and printed circuit boards (PCB). KiCad is developed by Jean-Pierre Charras.
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  4. Integrated CAD, CAM, and CAE featuring collaborative editing and cloud-based computation. Free license available for students and hobbyists.
  5. SOLIDWORKS is a leading 3D CAD software for design, analysis and product data management. SOLIDWORKS solutions can help boost productivity, harness intelligence, foster innovation, and facilitate collaboration.
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  6. Tinkercad is a super easy-to-use, browser based 3D design tool. With Tinkercad you can create 3D printable items: toys to play with, decoration to light up your home or jewelry to express yourself. You dream it, you can make it!
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  7. OpenSCAD is a software for creating solid 3D CAD objects. It is free software and available for Linux/UNIX, MS Windows and MacOS.
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  8. Shapr3D is a revolutionary 3D modeling software created exclusively for your iPad Pro and your Apple Pencil. Shapr3D is the only truly mobile CAD app - a quick but precise way to create 3D models for engineering, design, 3D prints, and more.
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  9. DraftSight is a professional-grade, open 2D CAD product for users who want a better way to read, write and share DWG files. DraftSight is easy to use and is available for professional CAD users, students and educators to download and activate for free.
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  10. BRL-CAD is a powerful cross-platform open source solid modeling system that includes interactive geometry editing, high-performance ray-tracing for rendering and geometric analysis, image and signal-processing tools, a system performance analysis benchmark suite, libraries for...
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  11. Onshape is a professional CAD system – Parts, Assemblies, Drawings – with version control and collaboration built in. Each Onshape plan (Free for STUDENTS, Professional & Enterprise) gives you all of the CAD and data management functionality with no time limit.
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  12. Rhino can create, edit, analyze, document, render, animate, and translate NURBS* curves, surfaces, and solids, point clouds, and polygon meshes. There are no limits on complexity, degree, or size beyond those of your hardware.
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  13. LEGO Digital Designer, or LDD, is a free computer program produced by the LEGO Group. The program allows users to build models using virtual LEGO bricks, in a computer-aided design like manner.

    Discontinued

    Discontinued as of 2018, as it's website shows (https://web.archive.org/web/20180209234326/https://www.lego.com/en-us/ldd/)

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    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    LibrePCB is a free EDA software to develop printed circuit boards. It’s currently under heavy development to bring out first stable releases as soon as possible.
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