APRS_Applications

from: https://xastir.org/index.php/Main_Page
Provides mapping, tracking, messaging, weather, weather alerts, and Search & Rescue features over radio or internet.

from: https://www.ka2ddo.org/ka2ddo/YAAC.html
for monitoring and contributing to the APRS network.
YAAC can be used stand-alone, or as an APRS RF-Internet gateway (I-Gate), or as a AX.25 digipeater.
Supports 16 different data reporting views natively, and can be extended with user-written "plugins" to add more functionality.
YAAC's map rendering does not depend on Internet connectivity, so it can be used wherever a portable computer and radio/TNC can be located.

from: https://github.com/wb2osz/direwolf
Dire Wolf is a software "soundcard" AX.25 packet modem/TNC and APRS encoder/decoder.
It can be used stand-alone to observe APRS traffic, as a tracker, digipeater, APRStt gateway, or Internet Gateway (IGate).
Why settle for mediocre receive performance from a 1980's technology TNC using an old modem chip? Dire Wolf decodes over 1000 error-free frames from Track 2 of the WA8LMF TNC Test CD.

from: https://github.com/n2ygk/aprsdigi
A specialized Amateur Packet Radio (AX.25) UI-frame digipeater for the APRS.
Uses the Linux kernel AX.25 network stack and SOCK_PACKET facility to listen for packets on multiple radio interfaces (ports) and repeats those packets.
Packets can be modified and sent on the same or other interfaces.
Aprsdigi can also use the Internet to tunnel connections among other APRS digipeaters and nodes using IPv4 or IPv6 UDP unicast or multicast.

from: https://thelifeofkenneth.com/aprx/
Acts as an APRS Digipeater and/or Internet Gateway.
Aprx can support most APRS infrastructure deployments, including:
- single stand-alone digipeaters,
- receive-only Internet gateways,
- full RF-gateways for bi-directional routing of traffic,
- and multi-port digipeaters operating on multiple channels or with multiple directional transceivers.

from: http://soundmodem.vk4msl.id.au/
Allows a standard PC soundcard to be used as a packet radio "modem".
The whole processing is done on the main processor CPU.
Now uses standard operating system sound drivers and so runs on all soundcards for which drivers for the desired operating system are available.
No fixed relationship between bitrate, sampling rate, and modem parameters.
Modems may be parametrized, and multiple modems may run on the same audio channel!
Usermode solution allows the use of MMX, VIS, Floating point and other media instruction sets to speed up computation.

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