ChemicalBurn is a free, attractive screensaver that simulates a data transportation network with a colorful, fast-moving array of "self-organizing" nodes and packages. You don't need any special knowledge to enjoy this screensaver's ever-changing, high-tech display, but networking enthusiasts will appreciate the simulation's veracity (as packages attempt to find the fastest way to their destination) and they'll love tinkering with detailed settings, including control over traffic and distance weighting (for example, as linear, square, log, and exponential functions). ChemicalBurn's calculations can be CPU-intensive--proportional to the cube of the number of nodes selected--so casual users should read the app's documentation before changing too many settings.
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