FireSock is the newest member of the modem sharing class, yet the technology used in the client is one of the oldest and most commonly used technologies on the Internet. Many experienced 'net users are familiar with Trumpet Winsock as the connection of choice back in the Windows 3.x days (albeit by default -- there were not many alternatives back then).
Although the integrated DUN capabilities of Windows 95/98 have largely supplanted the need for Trumpet Winsock, the new FireSock client allows the Trumpet Winsock technology to live on and is a great choice for sharing a modem and Internet connection over a small network.