For a while I have been searching for a WordPress plugin that could display at least the Google PageRank for a configurable list of sites in a dashboard widget. A requirement was that no third party site should be referenced to get the rankings. I couldn’t find one, so I wrote one myself.
The List Rank Dashboard Widget can display currently:
By default the Google PageRank, Alexa Rank and number of Delicious Posts are displayed for the current site, but more sites can be added using the settings. After entering a Google API Key and a Yahoo! Application ID (both free) the number of Google and Yahoo! Backlinks can be displayed too.
Included is a shortcode to display rankings in post, pages and sidebar widgets (see the Faq for usage instructions).
If you like to see more rankings, please leave a comment, but don’t ask me to add rankings, such as the Technorati Authority, which requires parsing an HTML response. Sooner or later this will break, when the design of the site is being changed.