An open source OPC DA Client SDK/ToolKit written in C++, support both 32 bit and 64 bit.

Softing OPC Classic SDK

Node.js package to access OPC Da 2.0 for reading and writing. Welcome your PLC JavaScript overlords. Better yet, program them!

NKOpcTunnel allows OPC (classic) data transfers between computers over TCP/IP without DCOM

OPC DA Client support any combination x86 and x64 client and server

Solution for exporting a OPC UA nodeset to XML.

C++ and C++/CLI extension for the open62541.org implementation of OPC UA

Small example ACAP application that reads analog gauges with video analytics and exposes the value via OPC UA.

Small example ACAP application that verifies if a certain area of an Axis camera's view has a certain color (within a set tolerance) and exposes the result as a boolean value via OPC UA.

OPC Client code which is intended for python.

OPC to ODBC server

Open Source C++ OPC-UA Server and Client Library

Universal Hart OPC server

Технограф-160 OPC сервер

KM-5 OPC Server

ReadWin OPC Server

OPC сервер для контроллеров Логика

OPC server for Danfoss ECL

OPC DA Sever for E+H Ecograph RSG35

An example of including and using nodesetexporter as a shared library.