Google Analytics: famous statistical analysis tool, it is relatively convenient for the full and free. Another plus: the ability to include your Adwords campaigns in your statistics.
Google Webmaster Tools: The tool dedicated to webmasters course it is, in my opinion, totally indispensable to anyone who wishes to follow the technical development of the site, while paying attention to the behavior of the Google search engine on its website. It is also possible to refine some parameters, such as speed crawl, page 404 or the robots.txt file.
Google Insight for Search: New service launched by Google, Google Insight for Search is a sort of "Google Trends" more complete. I have already mentioned this service in a previous post.
The Web Developer's SEO Cheat Sheet: this is a memo for Search Engine Optimization and not a very useful tool but. To keep in a corner, as long as we do a little SEO.
Delicious: you surprised? I do not. Delicious I think is an excellent tool for finding information on the web, more relevant than Google. Not only the site is filled with enriching and useful content, but in addition, various ancillary services allow you to deepen your research tool. Reassure me, you will not use the system bookmarks of web browser anyway (excluding sensitive information)?
Live HTTP header: a Firefox plugin that fulfills its function by showing you everything you need to know about the header of a web page. Practice to see if the page is accessed via any malicious redirects ...
Live Page Rank: tying me less this indicator, it is still useful to know whether a page is blacklisted for example ... This small and lightweight plugin for Firefox gives you the PageRank of the page visited.
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