Usando o FTP:
ftp -A -v mirrors.sonic.net <<eof
binary
get cygwin/x86_64/setup.xz setup.xz
eof
Usando o OpenSSL - note que isso só funciona para HTTPS:
openssl s_client -quiet -connect superuser.com:443 <<eof
GET / HTTP/1.0
Host: superuser.com
eof
Usando o lynx:
lynx -source example.com > index.html