If SECockit is too expensive for you, my next best choice is Long Tail Pro as it is a very capable tool. Its just a little slower than SEcockpit because it is not a web-based application.
Welcome to DNF.com™ - Domain Sales, Domain Forum, Domain Appraisals, Domain Registrars
If you are new to domains and looking to buy, sell and learn about domains then you have come to the right place. DNForum is the largest domain name community on the internet and continues to grow every day. There are over 500,000 domainers on DNForum doing everything from buying domains, selling domains, learning about domains and discussing domains. Take a minute and Register.
Long Tail Pro 2014-07-09
Keyword Research Software