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.
Please note that OWFS sourcecode, and all Issue/Tickets/merge requests have now been moved to https://github.com/owfs/owfs/.
Developer mailing lists will still be kept at Sourceforge.
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OWFS -- 1-Wire file system. Use the Dallas 1-Wire and iButton chips with standard filesystem commands. Create temperature loggers. Monitor everything. OWHTTPD -- same system, only used as a light weight web server.