QUOTE(Christophergrimes @ Sep 3 2013, 03:33 PM)
It basically lets you analyze the web page from the eyes of a search engine crawler hence eliminate images, add-ons and other features giving only the text. You can perform a variety of tasks right from highlighting headers to scrutinizing the links present on the web pages.
I have only used the seobook toolbar and seoquake tool bar.....Both are very helpful. Somehow my points are with seobook toolbar because it provides some extra features that really help me. Toolbar from seomoz is free but require payment for getting more features so payment is essential more having it all.