Open Source CAD Software

GeoPDEs is a suite of software tools for research on Isogeometric Analysis of PDEs. GeoPDEs is free software implemented in Octave and fully compatible with Matlab. GeoPDEs is no longer developed at SF, and has moved to GitHub. Please visit http://rafavzqz.github.io/geopdes/ The mailing list will remain active. Releases up to 2.0.4 can be found here. From version 2.1.0 onward, see https://github.com/rafavzqz/geopdes

MaxFem is an open software package for electromagnetic simulation by using finite element methods. The package can solve problems in electrostatics, direct current, magnetostatics and eddy-currents. Since version 0.4.0, MaxFEM requires Python 3. We have moved the installers to the MaxFEM website (see below). In order to improve MaxFEM, we will require you to fill out a simple form before downloading them.

ArchNURBS is a MATLAB tool for the analysis of planar curved structures, with a particular attention to masonry arches. As in CAD softwares, the geometry of the model is defined by a NURBS representation of the structure. Indeed, the user can upload geometries imported from a CAD environment. Based on such a representation, ArchNURBS performs the elastic isogeometric finite element analysis and the collapse limit analysis of the structure. It is possible to include in the analysis the presence of Fiber-Reinforced Polymers (FRP) extrados and intrados strips. A comprehensive descritpion of ArchNURBS is given in "ArchNURBS: NURBS-Based Tool for the Structural Safety Assessment of Masonry Arches in MATLAB", A. Chiozzi, M. Malagu', A. Tralli and A.Cazzani, J. Comput. Civil Eng., 2015. (http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29CP.1943-5487.0000481) ArchNURBS has been developed thanks to a collaboration between the University of Ferrara (Italy) and the University of Cagliar

Data Mining Platform is a platform for data mining and analysis. It contains many of the new and sophisticated methods such as kernel-based classification, two-way clustering, bayesian networks, pattern recognition for time series analysis and many other

Starting off as a simple LISP command in AutoCAD this HAVC pipe size calculator was migrated to a standalone Java application. Calculates HVAC minimum pipe ID based on GPM and FPS for numerous fluid types (found in the fluid density chart on EngineeringToolbox.com) Includes a table to automatically calculate riser piping sizes per floor. Read the README.txt file included in PipeSize.zip for instructions.

A free, multi-layered, multi-license cad engine. You are free to use the core classes.