Meandre
http://www.seasr.org/meandre/about/
Meandre is a semantic enabled web-driven, dataflow execution environment. It provides the machinery for assembling and executing data flows -software applications consisting of software components that process data (such as by accessing a data store, transforming the data from that store and analyzing or visualizing the transformed results).
http://www.seasr.org/meandre/documentation/