KWFinder is one of the biggest selling pay per click keyword tools. It has been featured in many online business directories and blogs as one of the best tools to help webmasters understand and maximize the potentials of their websites. KWFinder is extremely user friendly, and it can be set up very quickly and easily even by a beginner in the field. The program contains a huge database of keywords and backlinks which are updated regularly, so you can get the most out of your advertising dollars.