generative modeling for Rhino
there should be a sound option in grasshopper that rings when an operation is done calculating. i find myself watching the screen like one would watch grass grow. It gets kind of suspenseful at times. I may even get some rest if i can put my head down and wait for a beep in my headset.
You can open the windows taskbar to see when the cpu stops working. A system tray icon will appear with cpu load, so you can work on other stuff and still check if GH is at it.
Also, I think you can add alerts through perfmon.msc to run when certain threshold is met, I haven't tried it though.
Only works on PCM files btw.