ProScan might be a bit more popular than UniTrunker. We know about 1 link to it since March 2021 and only 1 link to UniTrunker. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
If this is just for entertainment purposes, have a look into software-defined radio (SDR). Receive-only units start at about $30, add another $10 and you get a kit with some cables and a couple different antennas (or make/use your own). The software is free--there are several choices ranging from SDR# ("SDR Sharp", which is one of if not the most popular for Windows) to SDR++, SDRTrunk, or Unitrunker--plug... Source: about 2 years ago
As scanners these days are very complex to program, you will then want to subscribe to radioreference.com and download a program such as Proscan (proscan.org) which will help automate the scanner programming process. The folks over in the radioreference.com forums are helpful if you get stuck with the software/programming. Source: over 1 year ago
BuTeL ARC - ARC is programming software for radio frequency scanners.
ScannerCast - Shoutcast/ICEcast compatible broadcasting for scanners.
Scancat Lite Plus - Scancat is the only programming software that supports ALL police scanners in one single program.