ShareTheNet

ShareTheNet lets you
share your low cost Internet connection across your network. Using
ShareTheNet, all of the computers on your network can do their own work on
the Internet as though they have their own connection. ShareTheNet allows
just about any network software to use the Internet. No more funbling with
SOCKS settings for each package on every machine. And ShareTheNet is
ultra-secure right out of the box. You don't have to worry about hackers
viewing and changing your private files.