AC3D is a 3D modeling and animation software that is used to create 3D games, movies, simulations, and other interactive 3D content. It is an easy to use, cross-platform 3D design tool that allows users to quickly and easily create 3D models, animations, and simulations. With AC3D, users can create realistic 3D models with texturing, lighting, and animation capabilities. It supports a wide range of 3D file formats, allowing users to share their work easily. It also has an intuitive user interface and supports both low- and high-end graphics hardware. The software is great for creating 3D content for game development, architectural visualization, product design, and more.
Discontinued According to the official website k-3d.org: The latest version of the "source code" is from November 2015. And the latest binary executable version is even older. According to its Sourceforge page (https://sourceforge.net/projects/k3d/files/K-3D Win32 Binaries /), the latest version is from June 2010.