MacResearch

FieldView is a molecular viewer/editor that is designed to show molecules with their associated Field patterns and physicochemical properties.
http://www.cresset-group.com/product/fieldview

Cresset offered this as a free download for Windows and Linux users, I asked about a Mac OS X version, and here is the response:-

http://www.linkedin.com/updates?discuss=&scope=321459&stype=M&type=U&topic=127e11bc-0b73-49e4-b7c4-6677d02d6ec0&a=V2Hl&trk=EML_nus_share

"we are looking into this as the technology platform we use for the application should allow us to generate a MacOS version fairly quickly. We are still trying to gauge the market needs for the Mac version, but we have interesting data coming from our website analysis suggesting that Mac's have made a big comeback in the sciences over the last couple of years."

If it is an application you might find useful then I suggest you register your interest.