RDS Surveyor is being developed by Christophe Jacquet, a French radio ehtusiast.
Download latest release (updated 2018-04-06).
The base program is multi-platform. The release contains the Si407x and RTL-SDR drivers for Windows (32 & 64 bits) and MacOS. You need the Java runtime to run RDS Surveyor. Get it here!
If you need the drivers for another platform, I maybe I can build them for you. Just drop me an email.
Go to the GitHub page of the project and follow the instructions to build the Java executable, as well as hardware-specific backends (aka drivers) for your operating system.