MoleculeSketch

MoleculeSketch is a simple and easy to use drawing App for chemical formulas and reactions. It has following features: + add atoms and bonds nicely by position locking (can be disabled) + choose different double bond styles + add stereo bonds + add bonds with higher hapticity + type functional groups by double-clicking on symbol + show missing hydrogen atoms depending on free valences + "grow" and remove hydrogen atoms + show non bonding electron pairs on heteroatoms + change background color of drawing area and add a grid + copy/paste/cut molecules and drawings + paste drawings into other applications as pdf drawing + import from mol files (V2000 format) + use trackpad gestures for zooming and rotation + access drawing attributes from popover panels + add reaction arrows and text fields + calculate average mass and formula of molecules + group and arrange objects