Plural and Singular Keywords

[AprilS]

I have been searching all over webmasterworld.com and haven't found exactly what I was looking for...my apologies if this has already been answered.

I need to find a tool similar to Overtures keyword suggestion tool, that will produce numbers for both Singular and Plural versions of keywords. (id. cat , cats). I know there has to be SOME sort of tool out there as we used to use a company for SEO and they would give us answers for both the single and plural versions....anyone know a tool/program?

ANY help you could provide would be great!

[AprilS]

OH...another question...the SEO company we used to use would also provide keyword lists and how many times they were searched for in the past 1/2 hour...the report would also provide misspelled version as well. Does anyone know of a tool or software package we could purchase that does all of this?

[Jack_Frost]

Have you looked at Wordtracker?