The 0.9.7 version of PI-RX is available as a free download on our software library. The latest setup file that can be downloaded is 706 KB in size. Our built-in antivirus scanned this download and rated it as 100% safe. This free software was originally produced by OZ1CKG. The software relates to Communication Tools.
From the developer:
PI-RX is a beacon monitoring program capable of decoding PI4 and showing the performance of the decoded signal. PI-RX requires that your PC is synchronized to GPS, online time server (e.g. NTP) or other synchronization devices. It features automatic level control of input signal, log-file with received data, etc.
You may want to check out more software, such as MoonSked, ICQ Ignore Checker or Lodam Multi Tool, which might be similar to PI-RX.