Arcan Presents "Pipeworld" Dataflow Computing Interface
Arcan is described by its developers as:
Pipeworld combines ‘dataflow‘ programming (like Excel or Userland) with a Zooming-Tiling User Interface (ZUI). It builds dynamic pipelines similarly to (Ultimate Plumber), and leverages most of the gamut of Arcan features — from terminal emulator liberated CLIs and TUIs to dynamic network transparency. It follows many of the principles for a Diverging Desktop Future, particularly towards the idea of making clients simpler and more composable by focusing on interactive “breadboarding” data exchange.
Or it may be easier just showing the video of Pipeworld:
The code is open-source and available via GitHub.
There is also a lengthy write-up on Pipeworld for this "spreadsheet dataflow computing" model via the Arcan blog.