Open Source BSD 3D Modeling Software

This is an official mirror of FreeCAD. Code and release files are primarily hosted on https://github.com/FreeCAD/FreeCAD and mirrored here. FreeCAD is a general purpose feature-based, parametric 3D modeler for CAD, MCAD, CAx, CAE and PLM, aimed directly at mechanical engineering and product design but also fits a wider range of uses in engineering, such as architecture or other engineering specialties. It is 100% Open Source and extremely modular, allowing for very advanced extension and customization. FreeCAD is based on OpenCasCade, a powerful geometry kernel, features an Open Inventor-compliant 3D scene representation model provided by the Coin 3D library, and a broad Python API. The interface is built with Qt. FreeCAD runs exactly the same way on Windows, Mac OSX and Linux platforms.

K-3D is the free (as in freedom) 3d modeling, animation, and rendering system.

Regard3D is a free, multiplatform, open-source structure-from-motion application. It creates 3D models of objects, based on photographs from different angles.

MeshLab, a mesh processing system, for user assisted editing, cleaning, filtering and rendering of large unstructured 3D triangular meshes (typical 3D scanning meshes). The system relies for mesh processing tasks on the gpl VCG library (vcg.sf.net).

Art of Illusion is a full featured 3D modelling, rendering, and animation studio. It is written entirely in Java, and can run on almost any operating system.

LingBot-Map is a specialized project focused on mapping conversational or linguistic interactions within chatbot or AI-driven systems, providing a structured way to visualize and organize dialogue flows. It is designed to help developers understand how conversations evolve across different states, enabling better debugging and optimization of chatbot behavior. The system emphasizes mapping relationships between intents, responses, and transitions, creating a clear representation of conversational logic. It can be particularly useful in complex chatbot systems where multiple branches and conditions need to be managed effectively. The project supports extensibility, allowing developers to adapt the mapping system to different chatbot frameworks or AI models. Its design encourages clarity and transparency in conversational design, reducing ambiguity in dialogue flows. Overall, lingbot-map serves as a tool for improving the structure and reliability of conversational AI systems.

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

Importer library to import assets from different common 3D file formats such as Collada, Blend, Obj, X, 3DS, LWO, MD5, MD2, MD3, MDL, MS3D and a lot of other formats. The data is stored in an own in-memory data-format, which can be easily processed. www.open3mod.com/ is a 3D model viewer and exporter based on Assimp that is also Open Source.

GTS provides a set of useful functions to deal with 3D surfaces meshed with interconnected triangles including collision detection, multiresolution models, constrained Delaunay triangulations and robust set operations (union, intersection, differences).

Misfit Model 3D is an OpenGL-based 3D model editor. It supports multi-level undo, skeletal animations, texturing mapping, scripting, command-line batch processing, and a plugin system for adding new features. Complete online help is included.

Scroll World is an agent skill for producing immersive landing pages that feel like one continuous camera flight through a generated 3D world. It works with Claude Code, Codex, and other systems that support the SKILL.md format. The workflow interviews the user about the brand, message, visual direction, and ordered sequence of scenes. It then uses Higgsfield to generate still images, scene-entry videos, and connector clips built from matching boundary frames. A portable JavaScript engine maps scrolling to video time, adds lazy loading, and blends seams between clips. Templates and batch scripts cover prompting, frame extraction, encoding, page setup, and optional background removal. The output is framework-agnostic and can be embedded in plain HTML, Next.js, Vue, or Python-served sites.

OpenCTM is a file format, a software library and a tool set for compression of 3D triangle meshes. The geometry is compressed to a fraction of comparable file formats (3DS, STL, COLLADA...), and the format is accessible through a simple, portable API

HARFANG 3D builds real-time 3D tools for industry professionals. Its software suite is tailored to developers, designers and engineers aiming to efficiently and seamlessly develop, implement & deploy 3D solutions (HMI, VR/AR, simulation, interactive 3D), regardless of development language or platform constraints. HARFANG Studio is the ideal 3D editor for creating real-time scenes & animations that match your design vision. It can manage the entire 3D graphics production workflow in a simple and optimized manner, without compromising the integration in other development environments. HARFANG Studio’s philosophy is in line with that of HARFANG 3D engine, a compliant, straightforward, fast & lightweight. Everything that runs in HARFANG Studio is compatible with our Framework and its supported coding languages. HARFANG Framework is an easy-to-adapt, cross-platform, multi-language, powerful and optimized 3D visualization engine written in C++ and accessible via an open API in C++.

Tokenize is a Julia package that serves a similar purpose and API as the tokenize module in Python but for Julia. This is to take a string or buffer containing Julia code, perform lexical analysis and return a stream of tokens.

GraphCalc is a very gui graphing calculator. It has been called a good replacement for a TI-85. It is a must for any high school math student.

Ayam is a free 3D modelling environment for the RenderMan interface.

The Open-Source PyMOL repository has been moved to github: https://github.com/schrodinger/pymol-open-source We still use the pymol-users mailing list here on sourceforge. Please subscribe for community support: https://pymol.org/maillist (Note: SourceForge email newsletter and special offers are optional and can be unchecked) The PyMOL community wiki has its own home: https://pymolwiki.org/

Structure Synth generates 3D structures by specifying a design grammar. Even simple systems may generate surprising and complex structures. Structure Synth offers a graphical environment with multiple tabs, syntax highlighting, and OpenGL preview.

OGITOR is an attempt to build a general purpose editor to quickly create scenes which can then loaded in an OGRE application for both rapid prototyping purposes and also supplying a WYSWYG editor environment for OGRE.

Interactive application to generate and view random fractal planets and terrain with oceans, mountains, icecaps and rivers, then export them to POV-Ray format or Blender. Written in C++ using Qt and OpenGL.

This project is no longer valid. See vpython.org.

SaVi - simulate Starlink, Iridium, Globalstar, O3b, GPS, Galileo and other satellite constellations, modify them, or design your own. Requires Tcl/Tk and Unix libraries; 3D viewing option requires Geomview running on X Window.

Converts a raw digitized polygon mesh to a clean mesh where all the occurrences of a specific set of "defects" are corrected. Holes, self-intersections, degenerate and non-manifold elements are all replaced with valid configurations.

GLE is a library of C functions that draw extruded surfaces, including surfaces of revolution, sweeps, tubes, polycones, polycylinders and helicoids. GLE uses the OpenGL(R) API to perform the actual rendering.

A parametric, feature-based, sketch-driven 3D CAD application, built around a geometrical constraint solving engine. Project is in early development stage. The FreeSG library (http://freesg.org/) is required.