APRS
The WhereAVR
http://www.garydion.com/projects/whereavr/
ATmega-TNC. An ATmega8 based UI TNC
http://users.rcn.com/carlott/atmega-tnc.html
PIC16F876 miniTNC
http://www.qsl.net/ew1ln/pic876tnc.html
TNC-X - The Expandable TNC
An Inexpensive KISS-Mode TNC
http://www.ariasti.it/Public/data/stefano/20067792039_pictnc.pdf
A Simple PIC88 based APRS TNC:
http://www.foxdelta.com/products/minitnc.htm#foxdigi
K8LG MINI PIC KISS TNC
http://www.cbradio.cz/doc/_Other/PR%20modem/MINI%20PIC%20KISS%20TNC/info.pdf
UniTRACK
http://www.hamradio.cz/aprs/dalsi/UniTrack/index.htm
Visualizzatore APRS/DxCluster portatile
Visualizzatore APRS/DxCluster portatile
Peek_SVW
Peek_SVW
OpenTracker