OpenSCAD is a software for creating solid 3D CAD objects. It is free software and available for Linux/UNIX, MS Windows and Apples OS X. Unlike most free software for creating 3D models (such as the famous application Blender) it does not focus on the artistic aspects of 3D modelling but instead on the CAD aspects. Thus it might be the application you are looking for when you are planning to create 3D models of machine parts but pretty sure is not what you are looking for when you are more interested in creating computer-animated movies. OpenSCAD is not an interactive modeller. Instead it is something like a 3D-compiler that reads in a script file that describes the object and renders the 3D model from this script file (see examples below). This gives you (the designer) full control over the modelling process and enables you to easily change any step in the modelling process or make designes that are defined by configurable parameters.

This course provides a beginner with the necessary mathematics, software, and practical details to leverage projector-camera systems in their own 3D scanning projects. An example-driven approach is used throughout; each new concept is illustrated using a practical scanner implemented with off-the-shelf parts. The course concludes by detailing how these new approaches are used in rapid prototyping, entertainment, cultural heritage, and web-based applications.

OpenGameArt.org is a community that brings like-minded coders and artists together for the purpose of creating Open Source video games, by providing a human-edited, searchable database of freely-licened art resources.

Open Asset Import Library is a free C/C++ library to import various well-known 3D model formats into applications. The library loads models in a straightforward in-memory format that can be easily read and processed by applications. Various post processing steps can be executed on the imported data to optimize it for a particular purpose.

A cadKIT™ for Processing for Object Oriented Geometry.Based on (anar+) parametric modeling scheme is a KIT of libraries.

It's a 100% free multimedia operating system intended for music production, graphic design, audio and video edition, and all kind of tasks. It contains an enormous collection of free (as in freedom) programs that can replace Windows.

Axel is an algebraic geometric modeler developed in the research team Galaad, which aim is to provide “algebraic modeling” tools for the manipulation and computation with implicit and parametric curves or surfaces. Its primary goal is to embed Synaps algebraic capabilities to provide new modeling techniques.