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  Function Grapher 31 Dec 14

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  Free Interest Calculator 31 Dec 14

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  X-Graph 27 Jan 15

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  Free Venn Diagram Maker 2 Jan 15

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  Z-Plot 22 Sep 15

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  Visual Matrix 31 Dec 14

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  OpalCalc 1 Dec 18

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  Base Converter 26 Jan 15