Information on useful tools for SEO:
Chrome PageRank Toolbar–
Much more than a PageRank checker, check your IP address, data centre location, your h1,h2 and alt tags, sitemap and more.
Basics to Keyword Research
Find links to Google Analytics and Google Adwords Tool
Google Webmaster Tools
Google Webmaster tools is important for anyone wishing to take control of their website. Identify broken links, malware and other issues and find out what search queries lead to your pages even with clickthrough statistics. It includes a website speed checker too in case your site loads too slow.
Google Trends lets you compare traffic for popular search keywords, phrases and websites. With this free tool you can determine whether a topic is rising in popularity or not.
Alexa Toolbar– The Alexa Toolbar works for Firefox, Chrome and Explorer. This free toolbar allows you to view the Alexa Traffic Rank (both globally and regionally), related links, cached versions of websites, website reviews and popular pages on the web.
Alexa Toolbar for Firefox Alexa Toolbar for Chrome