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  Logic Minimizer 15 Apr 15

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  Algebra Tile Factris 28 Sep 17

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  Random Number Generator 27 Jan 15

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  TeraPlot 22 Jan 15

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  WZGrapher 22 Jan 15

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  Simple Grapher Plus 7 Apr 16

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  Scilab 29 Apr 15

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  Abacus 23 Sep 15