KnittingHelp.com - Free knitting videos, help forums, free patterns, and much more!
The Crochet Crowd - Free crochet videos, patterns, tips, community, and more!
List of US Standard Crochet Hook & Knitting Needle Sizes - Chart from the Craft Yarn Council of America
Craftivism - activism centered on practices of craft
Craft's Long History in Radical Protest Movements - interesting article on the use of knitting and other crafts for activism over the years.
The Wartime Spies Who Used Knitting as an Espionage Tool - knitters weren't just providing soldiers with socks and sweaters but were also passing on important information clear back to the American Revolutionary War.
Strangely Captivating Vintage Photos of People Knitting - selections from Barbara Levine's book People Knitting: A Century of Photographs.
Yarn Bombing - street art using colorful displays of knitted or crocheted yarn. Believed to have begun in Texas in 2005 and spread internationallly to include International Yarnbombing Day first observed June 11, 2011.
Pussyhat Project - Knit, crochet, and sewing patterns for the infamous pussyhat.
Octo Project - Started in Denmark in 2013, colorful Octos are specially crafted out of 100% cotton yarn especially for premature infants.
Octopus for a Preemie - Facebook page with support, patterns, and more for making octopi for preemies.