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http://www.magicnet.net/~toddmac/equinox.html

http://sunserver1.rz.uni-duesseldorf.de/~pannozzo/3ds.html

http://www.arch.unsw.edu.au/helpdesk/software/autocad/cadnotes/intro.htm

http://www.mcp.com/newriders/

http://www.awa.com/nct/software/cadlead.html

http://web.arl.mil/software/brlcad/

http://www.cadmazing.com/cadmazing/

http://sobolev.mit.edu/

http://wensy.postech.ac.kr/

http://larch.lcs.mit.edu:8001/

http://www-cad.eecs.berkeley.edu/

http://akebono.stanford.edu/users/cad/synthesis/olympus.html

http://splat.baker.com/grand-unification-theory/eda/software.html

http://www.comsoft.com/

http://www.corelnet.com/

http://www.aue.com/

http://cad.ucla.edu/Welcome/

http://www.softdesk.com/

http://www.cadmazing.com/cadmazing/

http://www.ideal.com/

http://www.mrc.uidaho.edu/mrc/projects/classroom.html

http://www.cadsoft.de/

http://www.rahul.net:80/cadmazing/