openSCADA
openSCADA® is an open source SCADA system written in JAVA
... in several installations around this world.
openSCADA is supported. So if you prefer a fully supported, out of the box instead of a “build it yourself” solution you can contact IBH SYSTEMS GmbH and let us do the job. If you like, you will still get the source code that was developed specially for you.
openSCADA needs you. Writing source code, writing documentation, fixing bugs or providing fresh input. Anything is welcome.