AdWordAccelerator is another entry into the keyword research software tools pool, but this unique application has some features that set it apart from the pack.

AA is an automated tool that will help you build a campaign around highly-targeted AdGroup themes. It enables you to test out literally hundreds of AdGroup ideas to see which ones will meet your targets. Perhaps the most unique selling point is AA's ability to reveal which competitors' ads are getting better CTRs, allowing you to not only mimick what they're doing to succeed, while also showing you what Google users are searching for.

Most keyword research tools that target Google AdWords mine their lists of keyword phrases from Overture's system. AA takes an entirely different and deeper approach:

• Discover untapped broad and phrase match keywords that are both popular and inexpensive
• Unearth maximum clicks-per-day estimates 
• Negative keyword suggestions
• Competitive bid analysis, popular keyword misspellings, automatic meta-keyword extraction, and more!