ImplicitCAD - A math-inspired CAD program in haskell. CSG, bevels, and shells; 2D & 3D; gcode generation

•    Haskell

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ImplicitCAD is a programmatic CAD program, implemented in haskell. Unlike traditional CAD programs, programmatic CAD programs use text descriptions of objects, as in programming. Concepts like variables, control structures and abstraction are used, just as in programming. Generally, objects in programmatic CAD are built with Constructive Solid Geometry or CSG. Unions, intersections and differences of simpler shapes slowly build the object. ImplicitCAD supports all this and much more.

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QCAD - Crossplatform CAD Solution

•    C++

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QCAD is an application for computer aided drafting in two dimensions (2d). With QCAD you can create technical drawings such as plans for buildings, interiors, mechanical parts or schematics and diagrams.

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OpenJSCAD - Set of modular, browser and command line tools for creating parametric 2D & 3D designs with Javascript

•    Javascript

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OpenJsCad.org is a more up-to-date OpenJsCAD frontend where you can edit .jscad files either locally or online via JS editor (built-in). A few functions are available to make the transition from OpenSCAD to OpenJSCAD easier (scad-api built-in), as well CLI (command-line interface) for server-side computations with NodeJS.

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BRL-CAD - Solid Modeling System

•    Java

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BRL-CAD is a powerful cross-platform constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing for rendering amp; geometric analyses, network distributed framebuffer support, image & signal-processing tools.

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Librecad - Open Source 2D-CAD

•    C++

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LibreCAD is a comprehensive, 2D CAD application based on the community edition of QCad. It is available in more than 20 languages. LibreCAD has been re-structured and ported to qt4 and works natively cross platform between OSX, Windows and Linux.

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PYLEECAN - Electrical engineering open-source software providing a user-friendly, unified, flexible simulation framework for the multiphysic design and optimization of electrical machines and drives

•    Python

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PYLEECAN project provides a user-friendly, unified, flexible simulation framework for the multiphysic design and optimization of electrical machines and drives. The main objective of PYLEECAN is to boost reproducible research and open-science in electrical engineering. Thus, it is intended for researchers, R&D engineers and teachers in electrical engineering, both on standard and novel topologies of electrical machines.

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openscad - OpenSCAD - The Programmers Solid 3D CAD Modeller

•    C++

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OpenSCAD is a software for creating solid 3D CAD objects. It is free software and available for Linux/UNIX, MS Windows and Mac OS X. Unlike most free software for creating 3D models (such as the famous application Blender), OpenSCAD focuses on the CAD aspects rather than the artistic aspects of 3D modeling. Thus this might be the application you are looking for when you are planning to create 3D models of machine parts but probably not the tool for creating computer-animated movies.

Archimedes: The open CAD

•    Java

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Archimedes is a free and open source CAD (Computer Aided Design) software. It is a robust system built over Eclipse's Rich Client Platform fully based on plug ins. This means it is easily extensible but also has a pretty thin core that allows you to select the features you need and drop the other ones easily.

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K3Studio

•    C++

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K3Studio is the universal workbench for 2d/3d modeling, visualization and simulation. The main topic is simulation and visualization of automata networks, but it can be used for diagram drawing, flowcharting, presentation, as a CAD, GIS,...

CAELinux

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CAELinux is a live DVD Linux distribution dedicated to Computer Aided Engineering and Scientific Computing. Based on Ubuntu, it features a full software solution for professional 3D FE analysis from CAD geometry. It includes the Salome 3D pre/post processor, Code_Aster non-linear/multi- physics FE solver, Code-Saturne and OpenFOAM CFD solvers, Elmer multiphysics suite, GMSH, Netgen & enGrid 3D meshers, GNU Octave, Rkward, wxMaxima, Scilab, and more.

maker.js - Library for creating 2D vector drawings for CNC and laser cutter machines.

•    Javascript

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Maker.js, a Microsoft Garage project, is a JavaScript library for creating and sharing modular line drawings for CNC and laser cutters.

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pythonocc-core - An industrial strength 3D CAD python package

•    Python

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pythonocc is a python library whose purpose is to provide 3D modeling features. It is intended to developers who aim at developing CAD/PDM/PLM applications. Just replace "3.5" with "2.7" or "3.6" in the previous command to fit with your prefered python version.

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ArgoUML - UML modeling tool

•    Java

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ArgoUML is the leading open source UML modeling tool and includes support for all standard UML 1.4 diagrams. It supports Class diagram, Statechart diagram, Activity diagram, Use Case diagram, Collaboration diagram, Deployment diagram and Sequence diagram. The diagram could be exported to GIF, PNG, PS, EPS, PGML and SVG. It generates code for Java, C++, C# and PHP. It also supports reverse engineering, generates code from diagram.

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Green - Create UML diagram from code

•    Java

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green is a LIVE round-tripping editor, meaning that it supports both software engineering and reverse engineering. You can use green to create a UML class diagram from code, or to generate code by drawing a class diagram. green supports exporting files to both jpg and gif format, so that you can share you diagrams without any issues!

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OpenJsCad - 3D solid CAD using only Javascript

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Enthusiastic about OpenSCAD but somewhat frustrated by the limitations of its language, here is an alternative using Javascript. It's free, completely open source, still seriously under construction, based on Evan Wallace's CSG.js library and can be used from within a WebGL supporting browser. Currently Chrome and Firefox work well. The benefits over openSCAD are mainly in the language itself: you can use dynamic arrays for example, and solids can be stored in variables. It has built in support for 2D and 3D math, and handy features such as Connectors and Properties which make it possible to create more complex models.

3d-tiles - Specification for streaming massive heterogeneous 3D geospatial datasets :earth_americas:

•    Batchfile

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A building CAD model is fused with photogrammetry data using 3D Tiles, data courtesy of Bentley Systems. 3D Tiles is an open specification for sharing, visualizing, fusing, and interacting with massive heterogenous 3D geospatial content across desktop, web, and mobile applications.

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tldraw - A tiny little drawing app.

•    TypeScript

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tldraw is a tiny little drawing app. It helps to Draw diagram, Create flow charts. Entire app can be used as a react component. Diagram can be exported to SVG, PNG, JPG, WEBP.

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ModelGoon - UML for Java

•    Java

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ModelGoon provides support to create UML diagram from Java source. It provides support to build packages dependencies diagram, Class Diagram from existing sources, Build Sequence Diagram from a Java method, Shows the dependencies between user selected packages and lot more. ModelGoon is not a UML modeler, but just an UML point of view above the Java source code. It still uses UMLet for drawing purpose and the Eclipse Modeling Tools for implementing full MDA platforms.

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Jmol

•    Java

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An interactive viewer for three-dimensional chemical structures.

gaphor - Gaphor is the simple modeling tool

•    Python

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Gaphor is a UML and SysML modeling application written in Python. It is designed to be easy to use, while still being powerful. Gaphor implements a fully-compliant UML 2 data model, so it is much more than a picture drawing tool. You can use Gaphor to quickly visualize different aspects of a system as well as create complete, highly complex models. Gaphor is a UML and SysML modeling application written in Python. We designed it to be easy to use, while still being powerful. Gaphor implements a fully-compliant UML 2 data model, so it is much more than a picture drawing tool. You can use Gaphor to quickly visualize different aspects of a system as well as create complete, highly complex models.

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