What is the best free seo rank checker tool?

I am looking for a tool that can monitor my website rankings on search engines like Google, Yahoo bing etc ..

Is there any such tool around that is free ?

Two free great tools which I use:

1. Site Juice of Pear Analytics (www.pearanalytics.com). It is free right now cause it is in the Beta testing phase. Will check ranks in Google, Yahoo and Bing and will also store them for you.
2. SEO toolbar (a Firefox plugin) which has the Rank Checker tool. Very handy for instant rank checks but the disadvantage is that it automatically does not store your rank history.

Watching rankings is a waste of time. Rankings tell you nothing. Just because you rank number one for a keyword or phrase doesn't mean anything. Capture more useful data/ insights, such as what keywords are driving traffic to your site or do some keyword research and identify keywords in which you want to capture a lot of traffic from and monitor those results. At the end of the day you want more traffic to your site.

Plus with Google's personalized search it is tough to see what each individual user is seeing, each SERP will be different.

For google:

Google Webmaster Tools

Rank Checker:

http://tools.seobook.com/firefox/rank-checker/ for firefox

If you are looking for keyword / keyphrase ranker, digital points Keyword Tracker & Keyword Ranking Tool is pretty good - and its free. Not pretty, doesn't give advice - but good for gathering data.

http://dccheck.com/ is good to check the datacenter ranking differences between google sites.

http://www.googlerankings.com/index.php is good to do a site / keyword comparison - deals with allinurl's , etc.

Not free (but has a free trial): InboxSEO.com

I think that idpagerank.com would have a potential of worth to be the best SEO rank checker.

Microsoft's free SEO toolkit is really useful, you can use it against non-iis sites as well.

Google Toolbar shows you Google's page rank

I used to use WebCEO who i believe still offer a free version of the software. For comprehensiveness i would recommend them, but nowadays i'd prefer to use a SAAS (hosted) solution such as SEOmoz.

WebCEO also offer a free SEO University to help make sure you understand all of the basics.

You can get the Alexa toolbar (http://www.alexa.com/toolbar) for your browser. That will give you instant information about the traffic rank and evolution.

You can use also take a look at the Grader tools that HubSpot makes available for free (http://grader.com/). You have a Web Grader, a Blog Grader. These give you a good report on how your rate in SEO terms.

Hope this helps
Michel

CuteRank is a FREE keyword rank checker tool (software) designed to batch automatically check keyword positions and track keyword ranking performance on multiple search engines including Google, Yahoo, Bing (MSN), Ask, and AOL. CuteRank review seo tool.

Free: Aaron Wall's Rank Checker Paid: SEO Moz

Most of these are amateurish rank trackers. I would recommend RavenTools (monthly) or the fantastic Market Samurai (desktop). You can try 100s-1,000s of keywords instead of 1-10 at a time.

Use web ceo it's free for your first couple sites and tracking about 20 keywords. It will track your search engine ranking across the major browsers and keywords. Plus it charts it over time. Good product.