Sadly defunct. But it was an AlgebraOfFeeds thang.
Some good commentry though.
TimOReilly historical analysis : http://radar.oreilly.com/archives/2007/02/pipesandfilte.html
PipeDream seems to be a new version of it.
Quora Answer : Are there any flow-based graphical programming tools like Yahoo pipes, but with any local piece of software?
Great question. I can't say I know anything very close to what you're asking.
There are a lot of dataflow systems like Pipes which are specialized for music or video production. Max/MSP, PureData, VVVV etc. are like this. It is sort of possible to do other things with them too, though they aren't convenient for it.
Apparently Facebook released a Quartz Composer plugin for web development : You can now build an interactive mobile app, no code required, thanks to Facebook
What might be interesting to look into is whether someone has produced a graphical dataflow front-end for one of the build systems (see List of build automation software ) Haven't looked into it myself, but would be fascinating to know. And may be the easiest approach.
Update : I've now also discovered Node-RED for IoT type stuff.