Wikipedia
ChemDraw
ChemDraw is a molecule editor first developed in 1985 by David A. Evans and Stewart Rubenstein (later by the cheminformatics company CambridgeSoft). The company was sold to PerkinElmer in the year 2011. ChemDraw, along with Chem3D and ChemFinder, is part of the ChemOffice suite of programs and is available for Macintosh and Microsoft Windows. A simplified, touch optimized version for the iPad was released in late 2013.