JChemPaint is described as «editor and viewer for chemical structures in 2D. It is free and open source software, written in Java and so it runs on Windows, Mac OS X, Linux and Unix systems» and is an app in the education & reference category. There are six alternatives to JChemPaint for a variety of platforms, including Windows, Mac, Linux, Android and iPhone. The best alternative is Chemaxon Marvin, which is free. Other great apps like JChemPaint are BKchem, XDrawChem, ACD/ChemSketch and ChemDoodle.