The best free alternative to Catia is FreeCAD, which is also Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Catia and 17 is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Catia are LibreCAD, Dune 3D, Shapr3D and CAD Sketcher.
A powerful open-source parametric 3D modeler ideal for mechanical engineering, supporting Python scripting, running on Windows, Linux, and Mac, with modular architecture allowing extensive adaptability and use with scientific computing libraries.
LibreCAD 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.
Dune 3D operates as a parametric 3D Computer-Aided Design (CAD) software. It provides users with the capability to sketch and constrain both in 2D and 3D dimensions. Furthermore, it allows for the addition of chamfers and fillets to designs.
From design to manufacturing. Teams collaborate with more impact. Instinctive design meets multidevice capability and full interoperability for the ultimate 3D design workflow.
CAD Sketcher is a free and open-source project looking to enhance precision workflows in Blender by bringing CAD like tools, features and usability to Blender.
View, capture, personalize, and print 3D models. Download many kinds of 3D files and edit them using the 3D modeling space. Take a picture with your webcam and make it 3D.
MakerSCAD is a web-based parametric 3D design software with a block-based programming language to create objects for 3D printing, animations, games and websites.
DesignSpark Mechanical is a 3D modeling software reported to be easy to use so that all engineers will be able to create and share models.
Draft It is a comprehensive computer-aided design (CAD) software that simplifies complex design tasks with its user-friendly interface, catering to both professional designers and enthusiasts. It offers various versions, including a free edition and a professional Architectural...
SelfCAD is a simple but powerful 3D modeling software being used by beginners, professionals as well as both small and large businesses to create their 3D designs. With the program, users can be able to model, sculpt, render, and even slice designs.
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Free, simple, many interfaces in and out (STP, IDS, STL ...), still in development, many forums and macros available. BUT some bugs remain, hopefully we can find a workaround.