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  Python Spirograph 16 Apr 15

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  Free Histogram Maker 2 Jan 15

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  Free Equation Editor 20 Jan 15

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  Z-Plot 22 Sep 15

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  Orbit Xplorer 5 Dec 15

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  Visual Probability 31 Dec 14

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  Standard Deviation Calculator 23 Jan 15

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  Graph Paper Maker Software 9 Dec 14