NetSetMan is a network settings manager which can easily switch between 6 different profiles including IP Adresses, Gateways, DNS Servers, WINS Servers, Computer Name, DNS Domain, Workgroup, Printer, Net Drives... It is a freeware LAN configuration application that's advanced, portable, customizable, light on system resources and reliable.
Here are some screenshots to illustrate the features and user interface of this application:
Serial Port Redirector
Psiphon 3
The Dude
Hamachi
NetGong