Open Source Solid Modeling CAD
BRL-CAD is a powerful cross-platform constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing for rendering & geometric analyses, network distributed framebuffer support, image & signal-processing tools.
BLibrestez Robotics Software Library Project
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Rpg2Cpp (Rpg++) is a compiler that translates RPG-III and RPG/400 sources from IBM-midrange systems (iSeries, AS/400) to native C++ code. C++ class-libraries resembling the RPG-III datatypes are included as well as a tiny CL-runtime-system.