Blender

Blender is a powerful, public project that provides a complete 3D creation suite, entirely free and open source, forever. It's used by designers, artists, and engineers for everything from feature films and TV series to advertisements and design visualizations. The software is well-supported by major hardware vendors and is an integral part of the professional graphics industry.

Its extensive feature set covers the entire 3D pipeline:

• Rendering: Achieve stunning, ultra-realistic results with Cycles, the built-in path-tracer engine offering real-time previews, CPU & GPU rendering, and PBR shaders.
• Modeling & Sculpting: A comprehensive array of tools makes creating, transforming, and editing models a breeze, with full N-Gon support, advanced sculpting brushes, and 3D painting.
• VFX: Integrate visual effects seamlessly with production-ready camera and object tracking, allowing you to import and track raw footage directly in your 3D scene.
• Animation & Rigging: Bring characters to life with high-quality rigging and animation tools, including automatic skinning, a curve editor, and sound synchronization.
• 2D in 3D: Draw directly in the 3D viewport, opening up unique workflow possibilities for storyboarding and 2D art.

The interface is fully customizable, and with a robust Python API, you can create your own tools and add-ons to tailor the software to your exact needs.