Check out this great work done in processing.
Untitled Mirror is a Processing based program that reads incoming video from a camera and triggers particles from points of the video frame that have changed by a certain level. The result is an image that is fairly representative, yet disappears within moments.
Flare is a collection of ActionScript 3 classes for building a wide variety of interactive visualizations. For example, flare can be used to build basic charts, complex animations, network diagrams, treemaps, and more. Flare is written in the ActionScript 3 programming language and can be used to build visualizations that run on the web in the Adobe Flash Player. Flare applications can be built using the free Adobe Flex SDK or Adobe’s Flex Builder IDE. Flare is based on prefuse, a full-featured visualization toolkit written in Java.
And view some other visualization api’s here - more links here at reddit
The Google Visualization API lets you access multiple sources of structured data that you can display, choosing from a large selection of visualizations. The Google Visualization API also provides a platform that can be used to create, share and reuse visualizations written by the developer community at large.
Or, if that bores you, simply checkout their Visualization Gallery
