I know there is a tool that allows me and others to track any website changes being made to any page by any webmaster who is advertising in google adwords and is making changes to tweak his pages for higher conversions.

What are the best 3 tools that can help me identify high converting pages in google adwords by allowing me to track if they are making changes or not, how many times they advertise and what keywords they are bidding and more...........

thanks

I use keyword spy, and it's great! It tracks changes, also, alexa spry, and it detects changes.