I've just created a little component library for generating gRaphaël SVG charts. Currently only pie charts and line charts are supported.... I'll probably only add other chart types as I need them myself.
Demo: http://tapestry-graphael.uklance.cloudbees.net/ Source: https://github.com/uklance/tapestry-graphael gRaphaël docs: http://g.raphaeljs.com/ I realise that there's already a tapestry-highcharts component library but I prefer gRaphaël's MIT license. Contributions / feedback welcome. Cheers, Lance.