Protovis – A Graphical Toolkit for Data Visualization
each marks encode data visually through dynamic properties such as color and position and also simplify the data visualization by allowing inheritance, scales and layouts.
All visualization data are work perfectly on all major web browser except internet explorer such as Firefox, chrome and opera without using any plugins. it’s a most declarative graphical toolkit and specially designed to learned by example.
Protovis is free and open-source project released under BSD license.