K-3D is free-as-in-freedom 3D modeling and animation software. It features a plugin-oriented procedural engine for all of its content, making K-3D a very versatile and powerful package. K-3D excels at polygonal modeling, and includes basic tools for NURBS, patches, curves and animation.
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According to the official website k-3d.org : The latest "source code" release is from November 2015. And the latest binary executable release is even older. According to its Sourceforge page ( https://sourceforge.net/projects/k3d/files/K-3D Win32 Binaries/ ), latest release is from june 2010.