Windows Networking
Use proxy servers to access from elsewhere
Get WEP or WPA keys from a WiFi network
Detect intruders using your WiFi
Hide your real IP address
Improve ping or lower lag in your online games
Sends you an email every time you have a different IP address
Repair your TCP/IP network when it fails
Show by remote control what you do with your PC to friends
Turns on a PC by remote control using MAC address
Limits the connection speed in a local network