MollyCule is described as «completely free Open Source Chemistry visualisation program for MacOS, Linux and Windows. MollyCule is designed to be a nice, easy to use program to help ordinary people who want to explore Chemistry» and is an app in the education & reference category. There are four alternatives to MollyCule for Windows, Mac, Linux and Wine. The best alternative is Chemaxon Marvin, which is free. Other great apps like MollyCule are BKchem, ACD/ChemSketch and ChemDraw.