Mosaico/. Great tutorial from akakbijoux. Simple but effective technique, with many possibilities.
Christmas Sweater Cane | Polymer Clay Tutorial Vol-079 http://www.beadsandbeading.com/blog/christmas-sweater-cane-polymer-clay-tutorial-vol-079/19237/
Marie Segal's extruder cane based upon a beading pattern.
Tutorial ~ Making a Polymer Clay Pendant using a Makin’s Clay Extruder | The Crafty Network
Easy peasy extruder cane technique from pediatrician/artist Ron Lehocky, who has sold 24,000 hearts with all the proceeds going to the Kids Center in Louisville, KY