free submarine/space/flight simulator

[prost]

submarine simulator from http://dangerdeep.sourceforge.net/gallery.html ,63Mb.

[Linux: works for 32 & 64 bit. To install I think you have to type:
sh dangerdeep-0.3.0-linux-installer.bin ]

www.palomino3d.org have a great jet fighter simulator.
http://sourceforge.net/projects/zsim have a glider simulator. I think you need broadband for both as they use openscenegraph.

Also http://earth.google.com/intl/en/download-earth.html has a flight sim for broadband.

http://www.dougsorbiterpage.com/ & http://orbit.medphys.ucl.ac.uk/orbit.html
have a spectacular free space flight simulator for all Windows. I don't have broadband, but wondered if anyone could try it with wine.