Open62541Open source implementation of OPC UA (OPC Unified Architecture) aka IEC 62541 licensed under Mozilla Public License v2.0
ASMDOPC UA Address Space Model Designer
OpcUaStackOpen Source OPC UA Application Server and OPC UA Client/Server C++ Libraries
opcua-esp32Embedded OPC UA Server on ESP32 based on open62541 stack
quasarQuick opcUA Server generAtion fRamework