"Weave (BETA 1.0) is a new web-based visualization platform designed to enable visualization of any available data by anyone for any purpose.
Weave is an application development platform supporting multiple levels of user proficiency — novice to advanced — as well as the ability to integrate, disseminate and visualize data at "nested" levels of geography."
Source code also available on GitHub
More info: http://flowingdata.com/2012/02/07/weave-for-visualization-development/
Via Robin Good