I have created a free tool for developers - http://www.postparrot.com. Along with a IP and header checker you can test out POST data with it. Hoping this will be helpful to some newbie developers out there that don't know how, or don't want to take the time to create a response checker. It can also be a big help when you are building spider tools that need to send variables. You can make sure the server is getting exactly what it needs to get before you send your real POST so that the webmaster on the server does not see all your failed POSTs and get wise to you. Hope this can help someone out there.