From Robert Kovac:
NetSetting is a small program for creating and managing profiles for TCP/IP protocol setting (IP address, subnet mask, default gateway and DNS servers). The user can create profiles for every network adapter and then use these profiles as needed. The program goes into the tray after start, so it is always by hand. It is useful especially for notebook users who are moving between various networks. This version is the first release on CNET Download.com.