From left to right: Addi Turbo, Addi Lace, Addi Natura, Clover Bamboo
Addis are too expensive. Anyway, here’s a photo for a comparison of their tips.
Not much knitting info here, but here are some great free patterns I’ve discovered on Ravelry:
Slightly More than Scarf , from Living in Stitches
Spring Cable Socks, from SpaceKnitty
Ribbed Lace Bolero, from 10 Feet High