INGEAR Allen-Bradley OPC Server is a low-cost alternative to Rockwell Software RSLinx.
INGEAR Allen-Bradley OPC Server Version 3.0 is one of the most powerful and intuitive data access servers you'll ever use.
INGEAR AB PLC ActiveX is the most comprehensive Allen-Bradley PLC driver for Visual Basic you'll find. Add a direct PLC communication link from Visual Basic/C++ to Allen-Bradley PLC controllers without the overhead of DDE or OPC.