Did you just stumble upon a file that has a digital signature from Rose City Software? If so, please read on.
You will probably notice Rose City Software when clicking to run the file. The publisher name shows up as the "Verified publisher" in the UAC dialog as the screengrab shows:

You can view the additional details from the Rose City Software digital signature with the following procedure:
Here is a screenshot of a file that has been signed by Rose City Software:

As you can see in the screengrab above, Windows states that "This digital signature is OK". This implies that the file has been published by Rose City Software and that the file has not been tampered with.
If you click the View Certificate button shown in the screenshot above, you can see all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, etc. You can also see the address for Rose City Software, such as the street name, city and country.
UTN-USERFirst-Object has issued the Rose City Software certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screenshot above.
The following are the Rose City Software files I've gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/47 | rfagent.exe |
| 0/61 | DiskMgkB.exe |
The detection percentage is based on the fact that I've collected 108 scan reports for the Rose City Software files. 0 of these scan results came up with some sort of detection. If you like, you can view the full details of the scan results by examining the files listed above.
The analysis is based on certificates with the following serial numbers: