Yes, it's called the Mac OS X Finder.
Mount your OSS volume on your desktop with the Finder's Go->Connect to Server... command, with the volume being https://sync<n>.omnigroup.com/<OSSusername>/
You can set this up as a Login item so it happens automatically.
It may take some experimentation to find the correct number to use for <n> in the URL: start with 1 and go up. I suggested to Omni that it would be useful to actually provide this nugget of info on the OSS account info page, but that idea was dismissed in favor of forcing you to contact the support ninjas.
Mount your OSS volume on your desktop with the Finder's Go->Connect to Server... command, with the volume being https://sync<n>.omnigroup.com/<OSSusername>/
You can set this up as a Login item so it happens automatically.
It may take some experimentation to find the correct number to use for <n> in the URL: start with 1 and go up. I suggested to Omni that it would be useful to actually provide this nugget of info on the OSS account info page, but that idea was dismissed in favor of forcing you to contact the support ninjas.
Threaded Mode