JChemPaint (or JCP for short here) is the editor and viewer for 2D chemical structures developed using the Chemistry Development Kit (CDK).
Cost / License
- Free
- Open Source
Platforms
- Mac
- Windows
- Linux
- Flathub
- Flatpak

The best open source alternative to ChemDraw is JChemPaint. If that doesn't suit you, our users have ranked more than 10 alternatives to ChemDraw and seven of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to ChemDraw are XDrawChem, Molsketch, ChemCanvas and BKchem.
JChemPaint (or JCP for short here) is the editor and viewer for 2D chemical structures developed using the Chemistry Development Kit (CDK).

XDrawChem is a free software program for drawing chemical structural formulas, available for Unix and Mac OS. It is distributed under the GNU GPL. In Microsoft Windows this program is called WinDrawChem.
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.




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.

The Gnome Chemistry Utils include six chemistry related programs:




MollyCule is a 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.



More simply for use in class