There is now an extension for Google chrome to check the page rank of a website easily. I’ve been using this extension for quite some time now and it’s really helpful to find out more about anysite site.
Note: You need to be using the beta version of Chrome (4.0+) in order to install extensions.
TO install

Google can help you find the whois of a domain. Here is how to test and check the whois of a domain. Google offers this option in partnership with Domain Tools

There is a project called data liberation project which aims at exporting or liberating the information from Google using a simple export feature. Here is a quick ‘how to‘ guide on ‘how to export all the documents from Google Docs‘ (PDF, WORD, EXCEL, PPT etc).
If you want to export all documents at once:
-

Google released a basic application for Windows that lets you upload files to Google Docs by using drag and drop. The application is more like a sample of what you can do with a Google Docs API, but it’s pretty useful if you want to upload a lot of documents. There’s also an option to