The latest keyword research tool (Beta Version) added in Wordze toolset is Free Adwords Search Tool
New Adwords Search Tool allows you to search the ads in Google Adwords. Simply type in a keyword or a domain and pull up the ads that match your keyword or domain search and see the ad title, ad body, domain, position, average price per click, and more.
Keyword Search Result:
Domain Search Result:
This New Adwords Search Tool can be alternative to Spyfu at zero cost. Spyfu is considered as the best PPC spying tool but very expensive. SpyFu has a monthly subscription fee of $49.95 a month.