fviz is a command line program for creating charts and other data-driven illustrations.
It reads input data from text and CSV files and produces the output graphic as a SVG or PNG file. All charts are highly customizable using a simple s-expression based syntax.
In addition to the command line program, fviz is available as the libfviz software library which can be embedded into any application that can link to C libraries.
BETA: Please note that fviz is pre-1.0 software under active development; It is usable, but things might generally still be a bit rough around the edges. To see what already works, have a look at the Examples page.