Free Business and Office Software

 OpenOffice.org - Open Office (A free full-featured office productivity suite that's compatible with Microsoft Office)
 Freebyte.com - Free Business and Office Software
 Download.com - Free Business & Productivity Software

Free Engineering Software

 AISI Short Span Steel Bridge Software Version 3.0 (free trial)
 AISI Splice Design Software Version 3.0 (free trial)

 Cold-formed steel design software AISIWIN by DEVCO
 Cold-formed steel design software CFSLT by RSG Software
 Continuous beam analysis software WinBeam by CAST

 Free computer software from Florida DOT
 Free software for structural design
 Free structural software - a comprehensive list

 Mathcad application & educational files: A complete list
 Structural Engineering Library 5.1 by ENERCALC (free trial)
 User contributed structural software from SEAOC
 Various engineering & drafting software from AEC Cafe

 If you know of any useful engineering software, email your suggestions to info@PDHonline.org

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