Pipe
Granted, this is neither the coolest script in the script library, nor is it a terribly useful function plotter, but it demonstrates one of the coolest features of Pipe: images as script output.
The demonstrated script outputs postscript which can be directly displayed in Pipe's output window. This makes it great for fast and easy visualization of data. Create a chart directly from input data, render images and see the output immediately. No more endless alternating between an editor, Terminal and Preview. You've got it all in one place.
Just the code still needs to be written by you. (But we're working on that!)
