BRL-CAD is a powerful constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing support for rendering and geometric analysis, path-tracing for realistic image synthesis, network distributed framebuffer support, and image and signal-processing tools.
Big Fraction is a Java class that represents an immutable fraction, as held in a numerator and denominator. Calculations may be performed on this fraction, but the value is always held as a numerator/denominator pair. Therefore, no precision is lost. The fraction may be top-heavy, but is reduced when printed. The value can be converted into floats if desired, although precision will invariably be lost, and some large fractions (such as calculations for pi) can not be converted if the values of BigInteger exceed the range capable of floats.
Biomechanical ToolKit (BTK) is a cross-platform library for biomechanical analysis. It can read and write a large variety of file formats used in biomechanics, and can modify them. All these operations can be done with the C++ API or with the wrappers included (Python, Octave, and Matlab). The goal of this project is to help the community share data without the restriction of the file format or the biomecanical model provided by the manufacturer of the acquisition system.
Brook for GPUs is a compiler and runtime implementation of the Brook stream programming language for modern graphics hardware. The goals for this project are to demonstrate general purpose programing on GPUs, to provide a useful tool for developers who want to run applications on GPUs, and to research the stream language programming model, streaming applications, and system implementations.
CADTools is a modern 3D computer-aided design (CAD) and manufacturing (CAM) toolkit. The aim of the project is to develop an easy-to-use parametric, feature-based solid modeler with a generic geometrical constraint solver sufficiently robust for real-time mechanical simulations over complex assemblies.
Chebfun is a collection of algorithms and a software system in object-oriented MATLAB that extends familiar powerful methods of numerical computation involving numbers to continuous or piecewise-continuous functions. It also implements continuous analogues of linear algebra notions like the QR decomposition and the SVD, and solves ordinary differential equations. The mathematical basis of the system combines tools of Chebyshev expansions, fast Fourier transform, barycentric interpolation, recursive zerofinding, and automatic differentiation.
The Chemical Structures project aims to provide a complete set of 3D molecular structures in CML format. As CML format permits structural data and many properties to be included, each file also contains additional information, like molecular weight, boiling point, melting point, or InChI code. Data can be explored with a CML-aware software, like Jmol, or by using a Web browser.
Cougaar is a Java-based architecture for the construction of large-scale distributed agent-based applications. It is the product of a multi-year DARPA research project into large scale agent systems, and includes not only the core architecture but also a variety of demonstration, visualization, and management components to simplify the development of complex, distributed applications.