qdpg.over-blog.com/
24 Janvier 2021
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. 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. Create 3D from 2D & back. AutoCAD software from Autodesk was one of the first CAD software to be released on the market in 1982, making it a very established CAD software across industries. Even though AutoCAD is popular and widely used, in the 3D printing community its popularity has decreased lately according to i.materialise's poll. Many users cite that. HeeksCAD is a free open source CAM software for Windows. This software works as both CAD and CAM software in which you can create 3D designs and also mill. K-3D is another free open source CAD software for Windows. In this software, you can create both 3D models and 3D animations. To do that, you can use its simple tools present on toolbar (scale, rotate, polygon edges, curves, etc.) along with Create menu tools (array, bicubic patch, bilinear patch, NURBS, etc.), to quickly create a 3D model.

SketchUp Make is the most widespread free general use CAD software. You can use it for 2D and 3D designs and has amazing capabilities. It is even better that about generic CAD software such as AutoCAD and Microstation. It aslo hase a huge library, called 3D Warehouse, where users and manufactures contribute with millions of ready to use 3D objects. You can download the software here https://www.sketchup.com/products/sketchup-make
Unrestricted freeware, Windows XP / Vista / 7 / 7 64 bit / 8 / 8 64 bit. Not allwed to use for commersial purposes
https://librecad.org/ is a fully comprehensive 2D CAD application that you can download and install for free. There is a large base of satisfied LibreCAD users worldwide, and it is available in more than 20 languages and for all major operating systems, including Microsoft Windows, Mac OS X and Linux (Debian, Ubuntu, Fedora, Mandriva, Suse ..).
Design for Mechanical engineer. Good qualiry 3D parameteric design. Highly recommened https://www.freecadweb.org/

A Cross Platform and Open Source Electronics Design Automation Suite. With the schematic editor you can create your design without limit; there are no paywalls to unlock features. An official library for schematic symbols and a built-in schematic symbol editor help you get started quickly with your designs.
Apple os x backup. https://www.qcad.org/
Για 3D αρχιτεκτονικό σχεδιασμό https://www.sweethome3d.com/ an application that helps you place furniture on a house 2D plan, with a 3D preview.
