Download an all-purpose chemical drawing and graphics software program from Advanced Chemistry Development (ACD). The package allows the use of templates or free hand; click and draw molecules, ions, stereobonds, text annotations, polygons, arrows, etc.; and it generates molecular weight and formula, and provides estimates of density, refractive index, molar volume, etc.
Extensive listing of chemical software, most of it freeware or shareware, that runs on the Linux operating system.
The OpenScience Project contains a directory of open source scientific software. The chemistry section lists resources under several categories including: biochemistry, biophysical, chemical information, crystallography, molecular viewers and editors, organic, periodic tables, physical, spectroscopy, surfaces, and theoretical and computational. A search engine is also included.