No specific info about version 2.1. Please visit the main page of IPConfig on Software Informer.
Vnc Address Book is a utility for saving remote VNC server details as bookmarks.
StatTrak Address Manager allows you to store addresses and print labels.
BeeThink IP Address WhoIs is a tool for looking up IP address information.
You can organize and manage all your personal and business contacts via web.
This Dencom Global Address Book allows all users access a shared common database
ClientIP Checker allows you keep track of your current IP.