Best SEO extension or plugin for on-page optimization

[net32SEO]

I was wondering what you guys might recommend for a browser extension or plugin that would help developers optimize each page for specific keywords.  I'm looking for a tool that will give me a grade on how well it's optimized with a recommendation checklist.  I would use SEOMoz's onpage analysis tool but it doesn't have access to my private development environment (hence the need for a plugin.)  Recommendations?

Thanks!

[glennfriesen]

In chrome, for on-page SEO stuff, I have continually used:

Check My Links -- Check My Links is a link checker that crawls through your webpage and looks for broken links.Mozbar -- SEOmoz MozbarScraper -- Scraper is a Google Chrome extension for getting data out of web pages and into spreadsheets.Wappalyzer (beta) -- Wappalyzer uncovers the technologies used on websites.Although the majority of on-page stuff I measure using Screaming Frog SEO spider, or using web-based tools like those in SEOmoz toolchest, or like WooRank.

[BoxLimited]

I use SEO Site Tools as this shows On Page / External Metrics plus show well the page is optimise and also gives suggestions on how to improve it.  I also use SEO Quake as this displays the Google Pagrank and the Alex Rank plus other SEO factors including text density and nofollow links.