OPCWare Client Developer Version 3.0.x - Lite is a Development software developed by Data Layers Ltd.. After our trial and test, the software was found to be official, secure and free. Here is the official description for OPCWare Client Developer Version 3.0.x - Lite: OPCWare Client Developer is the market leading suite of OPC ActiveX controls for multiple Integrated Development Environments including Visual Basic, Visual C++, C# (C Sharp), VB.NET, Delphi, LabVIEW, MS Office, and other VBA-enabled and ActiveX containers.
OPCWare Client Developer enables you to build first class OPC client applications with your language of choice, either completely from scratch, or as extensions to your existing applications. Full source code is available.
OPCWare Client Developer is available in Lite, Standard and Professional editions. [info] you can download OPCWare Client Developer Version 3.0.x - Lite free now.