From TonTin Press:
CR-ISP (Countdown Remainder on your ISP) is a program that keeps you informed of the time you have left online by using visible and audible warnings. It's useful for ISPs that limit your time online. CR-ISP will also automatically detect your ISP connection and notify you if that connection is lost. It will keep a log of all your connections. CR-ISP runs whenever your computer is on and uses very few resources. CR-ISP does not try to connect to your ISP, it simply sits in the background and lets you decide what to do if your connection is lost.