Kiwi Application Monitor is true to its name letting you monitor your Internet, application and CPU usage

Kiwi Application Monitor keeps the kiddies in check when they're on the computer. Find out if they're telling the truth when they say they've only been online for five minutes. Moreover though, you can delve into some of the more advanced features of this app to set memory usage limitations on certain programs, kill a program that's eating all your CPU cycles and more. Heck, you can even kick the kids off of MSN Messenger after they've been online for half an hour, block Internet access and much more. They'll thank you for it... just not right away.