| APRS VHF Propagation Maps | |
| WB9TLH APRS experimental Weather Station Map | |
| PL tones used for testing high profile digipeaters in and around the Bloomington Indiana area | |
| KIRK WB9TLH-10 APRSD status | |
| IU Student Union K9IU-12 APRSD status | |
| Real time telemetry via APRS from local repeaters and APRS nodes | |
| WB4APR's APRS Web Site | |
| Tri-State Amateur Working Group | |
| Find-U | |
| APRS Wiki | |
| Xastir Home Page |
APRS is a registered trademark of Bob Bruninga.