algorithmic modeling for Rhino
Proving Ground has just released Conduit, an open-source Grasshopper plug-in for data visualization and creating heads up displays. There you'll find a "click-once" installer, which should load it up onto your machine.
For now, its features include a number of simple chart types (including pie/donut, column, bar, line and bubble) as well as components for drawing text and 2D meshes to the screen.
Additionally, Conduit lets you create and manage style sheets, which enable you to maintain different "look and feel" setups that you can quickly load into new or existing projects.
These files are located in the source of the Bitbucket repository.
Please check out the code, and start building up your own dataviz solutions!