googleVis is an R package providing an interface between R and the Google Visualisation API. The functions of the package allow the user to visualise data with the Google Visualisation API without uploading their data to Google.
This is awersome. Google Ngram viewer allows you to explore the frequency of use of words, phrases and concepts in 5 million of books along history. You can do your own analysis at http://ngrams.googlelabs.com/