What The Craft - duh! :) t-shirt reconstructions, sewing, and more!
Fitz Patterns - Cool free patterns.
Thread Banger- DIY fashion and sewing instruction videos.
T-shirt Surgery on Livejournal - Community for sharing projects made from t-shirts, with tutorials from members.
Tudor Links - OriginalVictorian and Edwardian period patterns
Red Dawn - Nice collection of tutorials for constructing clothing for costumes.
Vintage Sewing - Free vintage sewing books in the public domain.
Savvy Seams - Free sewing patterns for clothing, accessories and housewares.
BurdaStyle - Nice open source patterns and how-tos, and a SewPedia for all those funny sewing terms.
Needle N Thread - Resources for hand embroidery, with video tutorials.
Sew News - Has some free patterns and designs available for download.
Threads - Website for the print magazine has a lot of articles with tips and tricks for sewing clothing.
Corset Generator - fill out your measurements, and get a corset pattern customized to your body!
Sublime Stitching - some basic embroidery stitches and some embroidery tips!
Embroidery Resource - Some free embroidery pattern downloads + hints and tips.
Futuregirl - A few handy embroidery and handsewing tutorials.
BurdaMode - Several free patterns from one of the better pattern companies.
Amy Butler - Free downloadable patterns.
Hancock Fabrics - More free patterns!
Sewing.org - Free sewing projects, tips, and more.
Sew Trendy - Sewing projects aimed at teens.
Fabricland - Free fleece projects.
Ericas - Variety of free patterns and sewing projects.
Etherwork - Pj pants with pockets and a few more tutorials.
Totally Stitchin' - Some easy sewing projects.
Generation T - Two free projects from the book!
Pattern Bee - Free vintage patterns - quilting, sewing, and embroidery.
Some individual tutorials:
Harajuku Punk Shirt tutorial by Diana Eng
Aline skirt tutorial
Shorts from pillow cases tutorial
How to draft a skirt pattern
Alexander McQueen kimono top pattern
Junya Wattanabe dress pattern
"Unfinished" dress pattern by Martin Margiela
Wrap skirt tutorial
Another wrap skirt tutorial
Pants or Leggings tutorial
Shawl Collared Blouse pattern
4 interesting gown patterns
peasant top pattern
Historical Chemise / Nightgown pattern
Reversible tube top
Jeans to ruffled skirt
Twirly Skirt tutorial
Baby bib tutorial
Super simple shorts for toddlers
Cloth Baby shoes
Mini Bowling Bag tutorial
Native American style leather mitts
Rag Flower Broach
Needle Felted cuff
Quilted Tie-Strap Bag
Mitered squares and striped patchwork bag
Fabric head band
Tote bag tutorial
Quilted wallet tutorial
Pointy Kitty Stuffy Pattern
Chibi kitty and bunny pattern
Popcap pincushion tutorial
Grocery Bag Dispenser
Felt garland and free quilt pattern downloads
Video for gathering with a sewing machine