I started using UI-View in 2003 and still have a copy running to monitor telemetry from two digipeaters.
I am surprised that no one has mentioned YAAC (Yet Another APRS Client).? Plenty of features, currently supported, developer responsive to problems and requests for features, runs on Windows and Linux (including Raspberry Pi).? Worth a look - just search for YAAC.
Bob? G0BUX/W0BUX
