Tableau Public

"In the same way that YouTube spawned a surge of new filmmakers, Tableau Public will bring on a new generation of data players and spectators."
Ted Cuzzillo, Datadoodle

Tableau Public is an incredible free downloadable resource that can be used to produce beautiful data maps... on any theme. The data can be downloaded direct into spreadsheets... or viewed, and manipulated, in tableau Public.

This is the most exciting data handling resource I've seen - and is the one used by The Guardian to achieve some of their beautiful data representations.

http://www.tableausoftware.com/public