openSCADA is a Supervisory Control And Data Acquisition System. It is platform independent and based on a modern system design that provides security and flexibility at the same time. It is flexible. It is not an out of the box solution, but a set of tools that can be combined in many different ways. It provides development libraries, interface applications, mass configuration tools, and front-end and back-end applications. It is used 24/7 in several installations around this world. Support is available from IBH SYSTEMS GmbH.
PascalSCADA is a framework for Delphi and Lazarus to quick development of HMI/SCADA applications. The platforms supported by PascalSCADA are Windows, Linux, and FreeBSD under 32 and 64 bits (FreeBSD only in 32 bits). You can communicate with CLP's, create interfaces, store values and alarms of process, and control users of the application.