Legal free software for academic use

Macintosh computers come with a C++ compiler called Xcode

Dev C++

http://www.bloodshed.net/devcpp.html

Bentley Academic MicroStation PowerDraft

http://www.bentley.com/en-US/Community/Academic/PowerDraft+Download.htm

Autodesk

www.engineersrule.org

or

www.architectsrule.org

SketchUp

http://www.sketchup.com/

http://sketchup.google.com/

Archicad – Macintosh and Windows

http://www.graphisoft.com/community/education/downloads/

http://info.graphisoft.co.uk/AABM/

http://www.graphisoft.com/products/archicad/solutions/sketchup.html

http://www.apple.com/uk/education/solutions/architecture/

Oasys from Ove Arup - £25

http://www.oasys-software.com/information/universities.shtml

Mathematica for students. £20-£80 depending on duration of licence.

http://store.wolfram.com/view/app/timedstudent/semester.str

JEdit programmers editor. Does syntax highlighting for more than 130 different languages including html and Ruby (as used by SketchUp). Free

http://www.jedit.org/index.php?page=download

Rhino evaluation. Free, but only Saves 25 times. Or does it?

http://download.mcneel.com/rhino/3.0/eval/default.asp

Maya Personal Learning Edition (free, nearly complete)

http://usa.autodesk.com/adsk/servlet/index?siteID=123112&id=7639525

Softimage/XSI (free, some limitations)

http://www.softimage.com

Piranesi 30 day trial. If you want to continue beyond that, Paul Richens has a few licences to give away.

http://www.informatix.co.uk/piranesi/downloads/windows/demo.shtml