WordPress is a great blog platform. Many people read blogs and leave comments. However, as a blogger, he or she may not stay on the blog 24 hours a day, 7 days a week.
This webhook & plugin can send you a notification that is triggered by some action happened on your blog, such as someone leaves a comment on your blog.
This is also a simple tutorial that can help people who would like to develop more advanced feature by themself.
You can get the plugin and installation guide here: http://www.bp-toys.com/share/demo.zip