Using this plugin, you can generate charts with
gnuplot inside Wordpress posts. The plugin caches
the charts after being generated, and does not need gnuplot on your system to run.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
This version does not require GNUPlot to be installed on the Web host server. It communicates with a custom hosted GNUPlot through the Web and returns the image to Wordpress. The images are cached for faster future response.