There are many out there. www.digitalpoint.com/tools/keywords is a good one If you have lots of sites, I would recommend Domain Dash Board
The submitexpress.com link is pretty interesting. I do wonder how it gets stats tho. I've been using google's webmasters tools for a while now and it can take months to update some of their information. I've never been to submitexpress and they seemed to pull all the information for several search engines in a matter of seconds - although google showed "0" links! Thanks for the link. I'm a bit obsessive about stats so it will be added to my monitoring toolbox
I suggest you to check it manually for a better result.. type: link:http://www.example.com/ on every SE