Top 1 gnuplot-graphs open source projects

RWP*Load Simulator - your tool for scripting, simulation and much more. Like having a bit of bash and SQL, a nip of C or Java, a dash of awk, a grain of sed plus drops of secret sauce in one single tool. See https://blogs.oracle.com/database/rwploadsim-oracle-db-performance-simluator for the announcement on the Oracle database blog.