Wind-powered knitting machine
You can find the strangest things on youtube, like this video of a knitting machine powered by a windmill:
And this old-fashioned sock knitting machine. It's mesmerizing to watch. (Okay, it's mesmerizing to watch if you like watching vintage sock knitting machines.)
Current project: I'm making a cowl on the yellow Knifty Knitter loom. I started it by using the pattern found at the Ben Franklin site, but after about 15 rows, I decided I didn't like the look of the plain e-wrap stitch. I was using just one strand of a Cascade wool in blue, and it was looking very ladder-ish. So, I frogged it all and began again, this time using the mock crochet stitch (instructions here). It's a very easy and pretty way to vary your loom knitting.