Few weeks ago I released PageRank extension for Chrome. It is available for download from my site: http://any-tech.ws/page-rank or from Chrome Web Store: https://chrome.google.com/webstore/d...dnoakgkmcekhcg
Main advantage of this extension is it's compatibility with Google Toolbar. Compatibility here means that my extension reports the same rank as official toolbar. Most other extensions that I tried (even popular ones) report rank incorrectly for some kind of URLs (https, urls with hashes, urls with "strange" characters, etc.).
Feedback, bug reports, feature suggestions are welcome.