Top 3 dns-sd open source projects

MDNS Generic
mDNS Library for nRF52, SAMD21, SAMD51, SAM DUE, STM32F/L/H/G/WB/MP1, AVR Mega, RP2040-based boards, etc. using Ethernet W5x00. Supports mDNS (Registering Services) and DNS-SD (Service Discovery). Ethernet_Generic library is used as default for W5x00
airprint-proxy
Advertise AirPrint printers for network printers located outside the subnet using node. GPL-3.0 licensed.
Servus
Zeroconf discovery in C++
1-3 of 3 dns-sd projects