123D Alternatives for Linux

Blender is a comprehensive, free, and open-source 3D creation suite supporting the entirety of the 3D pipeline—modeling, rigging, animation, simulation, rendering, compositing and motion tracking, video editing, and 2D animation pipeline.

FreeCAD is a powerful, open-source parametric 3D modeler designed primarily for engineering and product design, allowing users to create and modify real-life objects of various sizes with ease.

Wings 3D is a powerful, free, and open-source subdivision modeler ideal for creating intricate 3D meshes for various applications, including animation, rendering, and game development. Its context-sensitive interface and robust toolset make complex modeling tasks intuitive.

MakeHuman is an open-source professional software for creating realistic 3D human models. It simplifies character generation for various applications like animation, games, and scientific visualization.

K-3D is a powerful and free 3D modeling, animation, and rendering software. It offers a flexible plugin-oriented architecture for creating complex 3D scenes and animations.

Art of Illusion is a versatile, open-source 3D modeling and rendering studio built on Java. It provides a comprehensive suite of tools for polygon and subdivision surface modeling, procedural textures, and a powerful animation system. It's a great option for artists and designers looking for a free yet capable solution.

MODO is a robust 3D content creation platform offering powerful modeling, sculpting, painting, animation, and rendering tools. It empowers artists with a flexible workflow for creative exploration.

Houdini is a powerful 3D software suite for visual effects, animation, and game development. It provides artists with a node-based procedural workflow for creating complex simulations, models, and animations.

Gmsh is a versatile open-source 3D finite element mesh generator with a built-in CAD engine and post-processor. It is designed for efficient grid generation for numerical simulations across various engineering and scientific disciplines.

Silo is a focused 3D modeling application designed for creating high-quality polygonal models for various uses, including games, animation, and visual effects. It emphasizes a clean interface and fast workflow.