Molecule for Macintosh
- Structure editor. Especially suited for computational chemistry, supports several file formats and operations such as animations and optimizations. License fee required.
- http://www.chemie.uni-erlangen.de/ccc/hommes/molecule/

Hyleos ChemFileBrowser and ChemView
- Free Windows software for working with MDL SDF files and molfiles. Includes descriptors calculation like TPSA, molecular weight, HBd and HBa.
- http://www.hyleos.net

Marvin
- Java applets for the web developer who builds chemical internet/intranet sites. The package contains an applet for editing and visualizing molecules on a web page and one for viewing molecules on a web page.
- http://www.chemaxon.com/marvin/

Mol2Mol
- Molecule file manipulation and conversion shareware for Windows. Works with about 40 file formats. Screenshots, downloads, and purchasing information.
- http://web.interware.hu/frenzy/mol2mol/index.html

MOLGEN
- Program for the automatic generation of constitutional isomers and combinatorial libraries, for Unix/Linux and WinNT/95. Free demo available.
- http://www.mathe2.uni-bayreuth.de/molgen4/