But in the last weeks I came across some other tools for analysing the keywords that your competitors use for their PPC campaign…

why you would do that? well – engage in bidding war with them, find the nice and cheap long tail keywords to buy cheap even on Google, and of course saving time to doing (some of) the keyword research yourself… at least you save time on the “ME TOO” bidding … if THAT’s not a nice reason

These are listed unorderd and without any review – go play for yourself…

SpyFu
Long Tail Adwords
KeyCompete

Notice that I’m not an affiliate of any of these companies above – so far – so that might change.

For researching keywords on your own, you could as well do the job yourself using the classic

WordTracker
Trellian Keyword Discovery

You should also look into Keywords Analyser who combines the Wordtracker and Keyword Discovery accounts.

Google Free Keyword Tool
Google Free Traffic Estimator
Overture Keyword Tool
Overture Traffic Tool
NicheBot

or just take Aarons’ Keyword research tool which is FREE and really funky!

Enjoy!