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
Tapes with knitting needles scheme
High or low slipper socks with braids 2 spokes.
Crocheted and Knitted Lace. (Ideas and schemes)