OPC Classic for .NET
Advosol is the leading provider of OPC .NET components for Classic OPC DA, OPC HDA and OPC AE since 2002. The Client Development Kits and Server Toolkits support C# an VB.NET and work in 32-bit and 64 bit mode.
Transition to OPC UA
OPC UA add-on options for the Client Development Kits add UA capability without code changes. The OPC UA Converter Servers connect existing Classic OPC DA/HDA/AE and OPC UA server/client applications.
The uaPLUS OPC UA Server Toolkit supports multiple server implementation interfaces, simple to full-featured.
The EasyUA OPC UA Client SDK provides an API for a wide range of OPC UA features.