This is BlitzWatcher by Nathan.  I designed it so it would notify me and take me to a webpage when someone responded to a post I was 'watching'  I find it very useful and compact as well as simple to use.

To use it, simply put the url of the webpage you want to watch were it says URL and the  name you want to remember the page by in the blank that says name.  Press add and it adds it to your watching list.  To remove something from the list of things you are watching, click it and click the remove button.  When somebody has commented or posted on a page you are watching, you will get a notification and it will ask you if you want to view the webpage it links to.