There are 1 repository under digipeater topic.
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). For more information, look at the bottom 1/4 of this page and in https://github.com/wb2osz/direwolf/blob/dev/doc/README.md
LoRa APRS Digipeater based for ESP32
AX.25 packet radio digipeater for linux
Forked version of direwolf for SDR-based highly parallelized applications.
APRS routing library
Minimalistic embedded Linux system for setting up APRS digipeaters and/or internet gateways