Structurix!

Powerful Finite Element Analysis package for 2D and 3D constructions (frames and trusses)

Free Windows structural civil engineering software 2D/3D

Interactive structural analysis program that provides preprocessing, analysis, and postprocessing capabilities.

SourceForge presents the Estru3D project. Estru3D is an open source application. SourceForge provides the world's largest selection of Open Source Software. Structural analysis using the Stiffness Matrix method

Finite element analysis of 3-dimensional structures made of bars, designed for use in civil engineering.

Spreadsheet Template for Structural Engineering (FEA Analysis for beams, trusses, 2D-frames). It makes possible to create your own parametric models.Templates for engineering calculation (fatigue, concrete plates, etc)

SourceForge presents the FEMTA project. FEMTA is an open source application. SourceForge provides the world's largest selection of Open Source Software. Easy to use 3D truss analyzer using finite element methods.

Free software for static and dynamic analysis of 3D moment-resisting elastic frames and trusses. Written in ANSI C. Source code includes: frame analysis with elastic and geometric stiffness, LDL' decomposition, LU decomposition, Newton-Raphson iteration, sub-space iteration, Stodola iteration, static condensation, Guyan reduction, dynamic condensation, Matlab support and spreadsheet support. Graphical output and mode shape animation via Gnuplot.

SAS-CIVIL is intented as a finite elements menthod software, with application oriented to civil and structural engineer, it is designed in two modules, one for analisys and another for desing, all under GNU license.