Processing
Processing is an open source programming language and environment for people who want to program images, animation, and interactions.
Protovis composes custom views of data with simple marks such as bars and dots. Unlike low-level graphics libraries that quickly become tedious for visualization...
protovis composes custom views of data with simple marks such as bars and dots. unlike lowlevel graphics libraries that quickly become tedious for visualization, protovis defines marks through dynamic properties that encode data, allowing inheritance, scales and layouts to simplify construction.protovis is free and opensource, provided under the bsd license. it uses javascript and svg for webnative visualizations; no plugin required (though you will need a modern web browser)! although programming experience is helpful, protovis is mostly declarative and designed to be learned by example.
javascript visualization charts html visualisation