Digital Radio (and Packet)
Bavarian Packet Radio Group
- Baycom Packet support.
Colorado Digital Working Group
Indiana Digital Experimenter's Association (IDEA)
NB6Z's Homepage - HF digital mode ham radio
Packet Radio Home Page
- by N2WX of TAPR.
TAPR Packet Radio Homepage
TORUN Amateur TCP/IP Packet Radio Group/Gateway - Poland
Wide World of Packet Radio by KA4BYP