GRLevel3
An excellent live weather radar and storm tracking software package (GRLevel 3).  Used by TCARES EC/AECs/Net Controls.  Highly recommended!

InterWARN
InterWARN turns your regular internet connection into your own automated personal wire service for National Weather Service watches, warnings and statements including Storm Prediction Center watches and outlooks, and advisories from the National Hurricane Center. InterWARN’s completely customizable and interactive interface allows you to get the information YOU want with options that include visual and audio alarms as well as the ability to save, print, e-mail, and page all incoming weather information.