UI-View32 - is a 32-bit Windows APRS client.
 About program
The author, Roger Barker (G4IDE) became a silent key in September 2004, but UI-View32 is still one of the the most popular APRS clients. UI-View32 is no longer maintained due to the source code being destroyed after Roger's death per his wishes. That said, there is still a very active support group and also a development community creating add-on software for UI-View32.There are many "add-ons" and more get created from time to time.