This pattern is for knit slippers, but I can totally see using a wool sweater and cutting and serging slippers from it! Home Slippers - DIY. this is knitting, but I bet I could use this to crochet some
Cable poncho - this is a retail item ~ two rectangles, stitch to desired arm opening ~ stitch to form shoulders leaving a collar opening. pick up stitches for generous rolled collar . Hmm think this is doable!