APRS for DOS (original, requires 8088 or better, 640K RAM, VGA)
WinAPRS (32-bit Windows program, needs Win95/98 or Win 3.1 plus Win32s extensions)
MacAPRS (available for 68K or Power PC Macintosh computers)
APRS Plus SA (allows you to run Win95/98 Delorme Street Atlas 4 or later with as an APRS station)
PocketAPRS (allows you to use the Palm Pilot with OSv3 for APRS)
APRS for Win/CE, with support for most Win/CE devices, as well as most APRS map formats
Xastir (an open-source APRS-compatible system under development for Linux and other X-capable systems)
UI-View (A Win 3.1/95/98 APRS-compatible system that supports BPQ- and AGW-compatible devices)
AGW Packet Engine for Windows 9x adds support for Baycom modems, KISS TNCs and even sound cards
to WinAPRS, APRS Plus SA, and other programs.