MollyCule has been discontinued. Similar apps include Chemaxon Marvin, which is free. Other options are Molsketch, ChemDraw and BKchem. In total there are four Vector Graphic Apps like MollyCule for Mac, Windows and Linux.
Marvin suite is a chemically intelligent desktop toolkit built to help you draw, edit, publish, render, import and export your chemical structures and as well as allowing you to convert between various chemical and graphical file formats.
United Kingdom
A 2D molecular editing tool for GNU/Linux, Mac OS X and Windows. Its goal is to help you draw molecules quick and easily. Of course your creations can be exported afterwards in high quality in a number of vector and bitmap formats.
ChemDraw is a communication suite for managing, reporting and presenting Chemistry research. Produce precise chemical structures with our premier chemical drawing solution.
United States
BKChem is a free (as in free software :o) chemical drawing program. It was conceived and written by Beda Kosata and is currently maintained by Reinis Danne.
Czechia
EU
