1. WooRank
  2. HubSpot’s Marketing Grader
  3. SiteTrail
  4. SEO Workers
  5. Lipperhey
  6. SpyderMate
  7. DIYSEO SEO Report Card
  8. Seoptimer
  9. Free SEO Analysis by Web Gnomes
  10. Rapid Site Check
  11. Rapid PageRank enables webmasters to check their pagerank, monitor the PR of competitor’s backlinks, estimate a value of their site, and more. Try out some of our powerful (and FREE) SEO tools.
  12. SEOmoz | SEO Tools
  13. A collection of Free SEO Tools that check Backlinks, PageRank, Inclusion, Indexing, Authority, Age, HTTP Status Code, Whois Data, and Outbound Links brought to you by SEO expert Rand Fishkin and SEOmoz
  14. SEO Book Free Search Engine Optimization Tools
  15. Free link analysis and keyword research tools brought to you by SEO expert Aaron Wall