I'm currently using circular knitting looms from a charity shop to knit up odd balls from my stash into odd pieces for a charity shop. (Circular, you see.) I've done string bags, fancy scarves, children's hats (one with matching bag), and am currently working on a cylindrical piece to be used as a neck warmer/hood. It's possible to vary the stitch by using the equivalent of machine tuck stitch, and this comes out slightly different if done in the round or to and fro.