As you all know that keywords are the most important thing for any website... So you should choose your site keywords very properly....it should have good searches & less competition..Right.. I use - Google Adword tool & Google Insight tool - Its Free tool If anyone know more tools..you can add in the list best keyword check tools.. It will be helpful for me as well as for others
There's a new program out that is pretty strong that I've been using. It's called SERPAttacks, and they offer a free and paid version; but the free version gives you a lot of good info. Just Google it and check it out for yourself...