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

 Cold-formed steel design software AISIWIN by DEVCO
 Cold-formed steel design software CFSLT by RSG Software

 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 6.0 by ENERCALC (free trial)
 Various engineering & drafting software from AEC Cafe

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

---