List of Tools from SEOMoz
opensiteexplorer: Research and compare backlinks with competitors for intelligent and targeted link building. Identify top pages, view social activity data, and analyze anchor text.
followerwonk: Analyze your followers, discover deep insights about your social graph, target influences, search Twitter bios, connect with interesting people, and so much more.
Rank Tracker: Our Rank Tracker allows you to check, track, and monitor where your site lands in Google, Yahoo, and Bing. We watch your ranking and give you peace of mind.
On-page Analysis: Receive graded on-page keyword targeting. Find out how well your pages are optimized for target keywords, and improve your site for best performance.
Keyword Difficulty & SERP Analysis: Uncover opportunities, determine how challenging it is to rank for a keyword, and get a powerful analysis of your competitive landscape.
SEO Web Crawler: Check your site to see how accessible it is to the search engines, link information and identify common SEO problems that may be systemic.
SEO Toolbar: Our SEO Toolbar for Chrome and Firefox allow you to see link metrics, analyze page elements and SERP results, and quickly access your favorite SEO tools.
Mozscape API: Unleash your creativity and build your own SEO app with our Mozscape API. The power of our Mozscape Index is at your fingertips.
Competitive Link Research Tool: Find critical sites your competitors are getting links from but you aren't
Blogscape: Monitoring the blogosphere and more
Link Acquisition Assistant: Scour the internet to find new link acquisition sources
Historic Pagerank Checker: Reports the PageRank of a URL and shows previous PR scores
Top 500: SEOmoz's list of the top 500 domains & pages on the Web.