stunnel, Stunnel -- Universal SSL Wrapper
http://www.stunnel.org/
httptunnel, httptunnel creates a bidirectional virtual data connection tunnelled in HTTP requests.
http://www.nocrew.org/software/httptunnel.html
The best ! FPipe is a source port TCP/UDP forwarder/redirector.
http://www.foundstone.com/resources/proddesc/fpipe.htm
Interactive TCP Relay
http://www.imperva.com/application_defe.../tools.asp
Sang's Port Relay
http://sangria.inlink.com/port_relays.html
PortTunnel."TCP/IP port redirector with many features for the advanced user. "Like a Swiss Army Knife"."
http://www.steelbytes.com/software_network.html
Спасибо за все ссылки