The most common phrases targeted by PPC advertisers quickly escalate in price. You can still obtain low-priced clicks though if you're able to develop a large list of key phrases that fewer advertisers are bidding on. Keyword Lizard is a free keyword tool designed to expand your keyword lists by creating every possible combination of keywords. You can develop huge lists in just moments! Simply enter keywords into two or more input lists and with a single click, Keyword Lizard will combine the keywords in every way possible to generate a large list of potential keyword phrases.

Keywork Lizard also offers a subscription-based professional service. Designed for the Google AdWords professional, this service includes unlimited phone support provided by My AdWords Expert, LLC., additional keyword search options, secure database storage of your searches, Google AdWords Power Posting export to Text or CSV, sample PHP & Cold Fusion code for Keyword Conversion Tracking on your client's website.

If you're looking for a rich pool of keyword and phrase targets for your campaigns (who isn't?), be sure to check out Keyword Lizard.