Ravelry.com
Ravelry, 'nuff said!
knitty.com
Knitty.com is an online knitting magazine based in Toronto and published quarterly since fall 2002.
The magazine was founded by Amy R. Singer and has been edited by her since its inception. Knitty presents original knitting patterns, essays, and how-to articles written by professionals and non-professionals in the field. The site is one of the most prominent facets of the revitalization of the knitting craft scene in the 21st century. Traditional print media, television how-to shows, and books in the field refer to Knitty as a reliable and prominent source of information on the craft.
TECHknitting
Wisconsin resident, Gila Shoshany, uses wonderful illustrations and clear descriptions to explain various knitting techniques.
Yarn Standards
The publishers, fiber, needle and hook manufacturers and yarn members of the Craft Yarn Council have worked together to set up a series of guidelines and symbols to bring uniformity to yarn, needle and hook labeling and to patterns, whether they appear in books, magazines, leaflets or on yarn labels.
Knit Map
A searchable catalog of yarn stores from all over the world.
Knitting Pattern Central
Knitting Pattern Central is an online directory featuring thousands of links to free knitting patterns and illustrated knitting tutorials.
Knitter's Review
In depth reviews of yarns, books, tools and more
Written by author, publisher and designer Clara Parkes
Interweave Knits Online Index
Cumulative index that includes all issues published from Fall 1996 through Spring 2011 (including the Interweave Crochet and Knitscene special issues and all web-exclusive patterns).
KnittingHelp.com
Online videos showing various knitting techniques, often shown in both English (throwing) and Continental (picking) knitting.
Garment Ease Allowances
Not sure which finished bust measurement to choose? This site will help you knit that perfect close fitting, normal fitting or loose fitting sweater.
KNITPRO
KnitPro is a free web application that translates digital images into knit, crochet, needlepoint and cross-stitch patterns. Simply upload jpeg, gif or png images and knitPro will generate a graph sizable for any fiber project. knitPro digitally mimics the tradition of pre-industrial craft circles who freely shared patterns and passed them down from generation to generation.
Printable Knitter's Graph Paper
Tricksy Knitter Chart Maker
Free, online, easy-to-use knitting tool for making color charts.
Knitting Fiend Online Calculators
Free custom generated calculating tools for knitting: instant calculations for decreasing and increasing evenly across a row, spacing buttonholes, shaping the top of a hat and more.
Socknitters Home Page
All socks, all the time! This site has a great section on sock knitting tips and techniques