For free keyword tools you can try Adwords' keyword tool. SEObook also has a free keyword tool (give you suggestions and performance data from MSN, Yahoo! and Google).

For paid research tools there is Word tracker and Trellian although they both offer free trials and free keyword suggestion tools, I don't know what the paid version gives you.

Hope this helps

seo book's free seo toolbar extension - it makes my work so much more easier.

Love it!

Anyone else having a better tool suggestion?

I have recently installed the seo book extension on firefox and it is saving me loads of time.

all you need to do is right click & voila ! The world of seo id open before your eyes.

This is one my favorite reference regards on SEO: seomoz.org

Search status is a pretty good tool, but my favourite is wordtracker.

hmm, let's see... some of my favorite seo tools are the keyword tracker, backling checker, Search status...

Here are my favorite seo tools:

Google Analytics - for site's monitoring and analysis
Seopen toolbar
searchstatus adds on
informenter -
domain pagerank tool - for checking fake page rank
awtats and statcounter - monitoring site's traffic
Google Adwords Keyword Suggestion Tool
Wordtracker

wow those are many ^^ some of them are new to me thanks for the post...

you can go for word tracker, google ad words for doing keyword search or if you have used any tracking tool like statcounter tere also you can get the keywords you can come to know wat type of keyword people search.

hey thanks for the information, for the approach just study on SEO marketing , it much easier and organize...