There is a ton of software to visualise molecular structures across the web and we use many of them, however from time to time they lack of a feature that we need. XMol is developed to fill those gaps. For instance, we have found very helpful the automatic fragmentation and the easy manner to create series of structures for potential energy surface calculations (will be in the new version soon).
We use a lot of free and open source software (e.g., Linux, LaTex, Gnuplot, Scilab, ...). We believe that by distributing XMol, we give a grain of sand back. Therefore, you can use XMol software for free. It is open source, so you can download the source files .
If you find that this program is useful please let us know bugs and any kind of ideas/features to make this software better. If you're experiencing issues and concerns do not hesitate to send us a message: email@example.com.