I've collected these links for my page on car simulation. I haven't posted them in my site because I haven't reviewed the software. Perhaps some of them could help you.
- ftp://ftp.mecheng.asme.org/pub/fluid/ - ASME ftp server on fluid mechanichs, has a lot of software, it is always lacking bandwidth
- http://www-berkeley.ansys.com/cfd/CFD_codes_s.html - Berkely pages on software (code included) for CFD.
- http://www.fluent.com/ - Fluent page (just in case you win the lottery this weekend and can buy it)
- http://www.cfd-online.com/Links/soft.html CFD Online links page
- http://www.amath.washington.edu/~claw/ Clawpack for hyperbolic surfaces (curved manifolds) and shallow water propagation and inundation (actually I've used Tsunami Claw, is good for a newbie like me)
- http://www.freebyte.com/cad/misc.htm Freebyte links page for mechanical engineering (including CFD software)
- http://www.opencfd.co.uk/index.html Open CFD (should I say anything else?) part of OpenFOAM. You should know what it is.
- ftp://ftp.ncsa.uiuc.edu/Mac/UIFlow UIFlow for Macintosh. It rocks, I've toyed with it.
You'll find some other software I've tested, like FENICS, in my links page (sorry again, is at http://www.ciropabon.co.nr).