Software info - Website
Chemtool is a small program for drawing chemical structures on Linux and Unix systems using the GTK toolkit under X11.
Chemtool features:
Drawing chemical bonds and rings (moving, rotating, flipping and scaling); having text tool for addition in the drawing; printing the drawing; available predefined templates; possibility to import PDB file format and OpenBabel; exporting to multiple formats.
Chemtool is released under GNU General Public License.