gnuplot is a command-line program that can generate two- and three-dimensional plots of functions, data, and data fits.
License: Open Source
GnuPlot is a lightweight and easy-to-use plotting tool ideal for quick visualizations, while Python(x,y) offers a more powerful and flexible environment for data analysis and visualization, including interactive plots and extensive data manipulation capabilities. While GnuPlot excels in performance for large datasets and ease of use, Python(x,y) shines in customization, integration, and handling complex data tasks.