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Line Graph Maker - Create a line graph for free with easy to use tools and download the line graph as jpg or png file.
itch.io - An online game marketplace and community.
Desmos - A beautiful, innovative, and modern online graphing calculator.
GOG.com - DRM-free game store, selling both new and old titles. No clients required.
GeoGebra - GeoGebra is free and multi-platform dynamic mathematics software for learning and teaching.
GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.