Juanfi is an open source system for coinslot integration for mikrotik hotspot

WiFi-enabled GNSS (GPS, BeiDou, GLONASS, Galileo) fed NTP/RDATE server based on ESP8266/ESP32 and Arduino

WebSockets for microcontrollers

An lwIP-based Ethernet library for Teensy 4.1 and possibly some other platforms

Minimal IPv6 library for Ethernet controllers on Arduino

Ethernet Example for RP2040

WIZnet TCP/IP chips (such as W5500/W5100..) SAL framework implement.

Example of using SPI Ethernet module with esp8266

Embedded rust support for the Wiznet W5500 SPI internet offload chip

Connecting ESP32 to W5500 using micropython

Simple Ethernet WebServer, HTTP/HTTPS Client wrapper library for ESP32 boards using W5500 with LwIP Ethernet library. The WebServer supports HTTP(S) GET and POST requests, provides argument parsing, handles one client at a time. It provides HTTP(S), MQTT(S) Client and supports WebServer serving from LittleFS/SPIFFS

This is HTTPS/HTTP Server Library for ESP32, WT32_ETH01, ESP32 + LwIP W5500, ESP32 + LwIP W6100, ESP32 + LwIP ENC28J60. In the future, this library will support powerful-enough boards using LwIP WiFi/Ethernet, such as ESP8266, Portenta_H7, RP2040W, Teensy 4.1, etc.

Arduino Internet Watchdog Device. It will check for Internet connectivity and if it is lost, it will restart your router and/or modem. Includes HTML interface for controlling, monitoring and getting recovery reports.

RTOS-based binding for W5500 and LwIp

Add W5500 & W5100S Ethernet to Raspberry Pi Pico - CircuitPython

Arduino Library for ESP32/S2/S3/C3 asynchronous MQTT client implementation. This library, ported to support ESP32/S2/S3/C3, WT32_ETH01 (ESP32 + LAN8720), ESP32 using LwIP ENC28J60, W5500, W6100 or LAN8720. Supporting TLS/SSL for MQTTS Client

FreeRTOS Example for RP2040

Misc. unofficial ESPHome components

an IoT Edge device equipped with ESP32, DHT22, and Ethernet W5500

Arduino stm32 example for W5x00 ethernet modules