PPC Webspy

Product creator:  PPC Web Spy is Brad Callen's Pay Per Click (PPC) keyword research tool.

Overview: PPCWebSpy comes in the form of a plug-in that runs inside your web browser and is essentially a tool to support both key word research and competitor spying. 

The approach that PPC Web Spy takes is to uncover the successful key words used by competitors so that you can use these yourself.  The tool generates recommended key words and also gives a range of information and data on competitors' usage of key words.

There is a free version of the software but it is limited to only 10 random PPC keywords. However, if you pay the $97 for the Platinum version you can get 100 keywords “in use” by your competitors, in any niche.