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The Periodic Tables Package is an advanced suite of applications for both Windows and Linux that allow chemists and students alike to use the Periodic Table on their computers.
The JChemPaint Applet and Swing Application are Java programs for drawing 2D chemical structures like those found in most chemistry textbooks. It is based on the Chemistry Development Kit (cdk.sf.net). Downloads, tracker, and source code repository can be found on https://jchempaint.github.io