The GnomeChemistry Utilsprovide a fewGtk programsand a C++algorithm andwidget libraryrelated tochemistry. ItincludesGChemPaint, a2D chemicaleditor, and achemicalcalculator forraw formule,molar weight,masscomposition andisotopicpatterns. Italso comes withviewers for 3Dmoleculemodels, crystalstructues, aspectrumviewer, and aperiodic tableof elements.