APRS
From Wildsong
Lots of info
Some notes on available hardware
Argent Data Systems
Products for amateur radio including APRS applications
- 2m Transmitter MX146 from SRB
This is a 500 mW transmitter, $70
OpenTracker+ is open source / open hardware and uses a Motorola MCU.
Tracker2
These are just controllers, connects a data stream (eg weather or gps) to a Kantronics TNC.
They now have a Tracker2 with a 5 watt 2m radio now. T2-301 $229
Byonics
TinyTrak controllers and MicroTrak transmitters