See Also : List of high PR Social Bookmarking Sites
#3. Convert Word Documents to Clean HTML
#5. ROBOT.txt Generator
#6. Title and Description Optimization Tool
#7. Image SEO tool
#8. XML Sitemap Inspector
#10. Pingdom Website Speed Tool
#11. Microsoft Free SEO Toolkit
Right Keyword placement can help you to increase your On-page seo score , if you really wants to understand on-page seo then you must need to watch some popular blog like Shoutmeloud , Bloggerspassion and many other and check their what they do when writing new blog post ? Because as i checked they know complete game of Keyword because this is whole thing which makes you better then other to get rank and search how a user will search your blog through search engine either if you have placed proper keyword in your content then easily they can find you .
Better if you are newbie in this field and then you must need to try these few Tools i love it because when i was newbie they helped me a lot in setup my blog . Cheers!