KeyRow - free online keyword research tools set. Tools are user-friendly and very easy to use. With this you can check, not only your own website rankings, but also any other site on the internet. It shows keyword history - how website ranked in the past, if keyword position went down or up. It is one of the most important features, since you can track how website ranks in search engine.
Another great future - let you compare websites rankings. See your website and competitors ranks, compare their keywords, learn were you need to improve - this feature is very useful for search engine marketing and seo. While check website rankings you can get main idea of how much traffic does site receives from search engine. It is great help while you want to buy quality backlinks, do link building.
http://www.keyrow.com