You can use anonymous RCP to copy files and anonymous RSH to list directories.
rcp firstname.lastname@example.org:<filename> <local_filename>
where <filename> is the filename in the Netlib repository and <local_filename> is the local file in which you wish to have the data stored on your system.
For example, to retrieve sgetrf.f from lapack, type
rcp email@example.com:lapack/sgetrf.f sgetrf.f
rsh netlib.org -l anon ls <directory>
(On some machines, the command is remsh instead of rsh).
Normal ls options work; ls -l gets the size, etc. You can use metacharacters by putting the argument to ls in single quotes.